format-time-string: document new '+' flag

* doc/lispref/os.texi (Time Parsing), etc/NEWS:
* src/timefns.c (Fformat_time_string): Document the new
behavior, added for compatibility with POSIX.1-2017.

Update from Gnulib

This incorporates:
2019-02-24 nstrftime: support the ‘+’ flag
2019-02-24 stat, lstat: fix conflict with relocatable-prog-wrapper
2019-02-23 nstrftime: tweak arg order
2019-02-21 nstrftime: merge glibc strftime changes
2019-02-02 vla: add commentary about VLA_ELEMS
* build-aux/config.guess, doc/misc/texinfo.tex, lib/fstatat.c:
* lib/lstat.c, lib/nstrftime.c, lib/vla.h:
Copy from Gnulib.

Adapt hooks in Tramp

* lisp/net/tramp-archive.el (tramp-archive-cleanup-hash):
Remove autoload cookie.
(tramp-cleanup-all-connections-hook): Add `tramp-archive-cleanup-hash'.

* lisp/net/tramp-cmds.el (tramp-cleanup-connection-hook)
(tramp-cleanup-all-connections-hook): New hook variables.
(tramp-cleanup-connection): Set `tramp-current-connection' always
to nil.
(tramp-cleanup-connection): Do not call `tramp-recentf-cleanup'.
Run ´tramp-cleanup-connection-hook`.
(tramp-cleanup-all-connections): Do not call
`tramp-archive-cleanup-hash' and ´tramp-recentf-cleanup'.  Run
`tramp-cleanup-all-connections-hook'.

* lisp/net/tramp-ftp.el (top): Simply call `tramp-disable-ange-ftp'.

* lisp/net/tramp-integration.el (tramp-recentf-cleanup-all): New defun.
(top): Adapt `tramp-integration-unload-hook',
`tramp-cleanup-connection-hook' and
`tramp-cleanup-all-connections-hook'.

* lisp/comint.el (comint-skip-input): Set inhibit-read-only to t

Bug#33975

Ignore pending_signals when checking for quits.

pending_signals is often set if no quit is pending.  This results in
bugs in module code if the module returns but no quit is actually
pending.

As a better alternative, add a new process_input environment function
for Emacs 27.  That function processes signals (like maybe_quit).

* configure.ac: Add module snippet for Emacs 27.

* src/module-env-27.h: New file.

* src/emacs-module.h.in: Add process_input function to environment
interface.

* src/emacs-module.c (module_should_quit): Use QUITP macro to check
whether the caller should quit.
(module_process_input): New function.
(initialize_environment): Use it.

* src/eval.c: Remove obsolete comment.

* test/data/emacs-module/mod-test.c (signal_wrong_type_argument)
(signal_errno): New helper functions.
(Fmod_test_sleep_until): New test module function.

* test/src/emacs-module-tests.el (mod-test-sleep-until): New unit
test.

* doc/lispref/internals.texi (Module Misc): Document process_input.

* lisp/term.el: Fix minor compilation issues with cl-lib and lexbind

Remove left-over comment from the bulk comint->term query/replace.
(term-command-function): Rename from term-command-hook.
Give it a global default value.
(term-suppress-hard-newline): Mark it as generally obsolete.
(term-mode): Don't manually make hooks buffer-local.
(term--remove-fake-newlines): Fix assert -> cl-assert.
(term-char-mode): Use add-function.
(term-send-input): Use run-hook-with-args.
(term-dynamic-complete): Use run-hook-with-args-until-success.
(term-dynamic-simple-complete): Completion tables can be plain lists.
(serial-read-name): Simplify and fix misuse of `set`.

Adjust line wrapping on window resize and killing text

* lisp/term.el (term-mode): Advice filter-buffer-substring-function to
remove line unwrapping from killed text.
(term-reset-size): Add or remove line unwrapping depending on the new
terminal width.
(term-suppress-hard-newline): Mark obsolete.
(term-unwrap-line): Use text properties to be able to find the
newlines later.

Make pinyin to Chinese character mapping available to elisp

* leim/Makefile.in: Build the file pinyin.el from pinyin.map.
* lisp/international/titdic-cnv.el (pinyin-convert): New function that
  writes the library pinyin.el, containing a new constant
  `pinyin-character-map'.
* .gitignore: Ignore the generated pinyin.el file.

fix rmail armor decryption problems

* lisp/mail/rmail.el (rmail-epa-decrypt): Don't decrypt an armor
that was copied into the message from a message it is a reply to.
(rmail-epa-decrypt-1): Catch and ignore errors in
epa-decrypt-region.  Make armor-start and armor-end markers.

Don't clobber epa-mail-aliases

* lisp/epa-mail.el (epa-mail-default-recipients):
Copy elements of epa-mail-aliases; don't clobber them.

* doc/lispref/text.texi (Replacing): Fix a typo in recent change.

Cleanup also recentf files in Tramp

* doc/misc/tramp.texi (Cleanup remote connections): Mention also
recentf cache.

* lisp/net/tramp-cmds.el (tramp-cleanup-connection)
(tramp-cleanup-all-connections): Call `tramp-recentf-cleanup'.

* lisp/net/tramp-integration.el: New package.

* lisp/net/tramp.el (tramp-rfn-eshadow-overlay)
(tramp-rfn-eshadow-setup-minibuffer)
(tramp-rfn-eshadow-update-overlay-regexp)
(tramp-rfn-eshadow-update-overlay):
(tramp-eshell-directory-change): Move to tramp-integration.el

Don’t assume timersub and gettimeofday

POSIX does not specify timersub, and marks gettimeofday as
obsolescent.  Avoid porting problems by using timespec.h
functions instead.
* src/editfns.c: Include systime.h instead of sys/time.h.
(EXTRA_CONTEXT_FIELDS): Replace start and max_secs with
time_limit.  All uses changed.  This removes the need to call
gettimeofday or timersub.
* src/term.c (timeval_to_Time): Remove.  Replace all uses with ...
(current_Time): ... this new function, removing the need to
call gettimeofday.

Improve replace-buffer-contents/replace-region-contents

* src/editfns.c (Freplace_buffer_contents): Add two optional arguments
  for mitigating performance issues.
* lisp/emacs-lisp/subr-x.el (replace-region-contents): Move from
  subr.el.  Add the same two arguments as for replace-buffer-contents.
* lisp/json.el (json-pretty-print-max-secs): New variable holding the
  default MAX-SECS value json-pretty-print passes to
  replace-buffer-contents.
  (json-pretty-print): Use it.
* doc/lispref/text.texi (Replacing): Add documentation for
  replace-buffer-contents two new optional arguments.  Document
  replace-region-contents.

Make last Tramp change backward compatible to Emacs 24

* lisp/net/tramp-cache.el (tramp-get-file-property):
* lisp/net/tramp-sh.el (tramp-maybe-open-connection):
* lisp/net/tramp-smb.el (tramp-smb-maybe-open-connection):
Make them backward compatible to Emacs 24.

Jump to the current error in xref with zero prefix arg

* xref.el (xref--next-error-function): Handle the corner case of
n == 0.  (Bug#34462)

Avoid some double-rounding of Lisp timestamps

Also, simplify some time-related Lisp timestamp code
while we’re in the neighborhood.
* lisp/battery.el (battery-linux-proc-acpi)
(battery-linux-sysfs, battery-upower, battery-bsd-apm):
* lisp/calendar/timeclock.el (timeclock-seconds-to-string)
(timeclock-log, timeclock-last-period)
(timeclock-entry-length, timeclock-entry-list-span)
(timeclock-find-discrep, timeclock-generate-report):
* lisp/cedet/ede/detect.el (ede-detect-qtest):
* lisp/completion.el (cmpl-hours-since-origin):
* lisp/ecomplete.el (ecomplete-decay-1):
* lisp/emacs-lisp/ert.el (ert--results-update-stats-display)
(ert--results-update-stats-display-maybe):
* lisp/emacs-lisp/timer-list.el (list-timers):
* lisp/emacs-lisp/timer.el (timer-until)
(timer-event-handler):
* lisp/erc/erc-backend.el (erc-server-send-ping)
(erc-server-send-queue, erc-handle-parsed-server-response)
(erc-handle-unknown-server-response):
* lisp/erc/erc-track.el (erc-buffer-visible):
* lisp/erc/erc.el (erc-lurker-cleanup, erc-lurker-p)
(erc-cmd-PING, erc-send-current-line):
* lisp/eshell/em-pred.el (eshell-pred-file-time):
* lisp/eshell/em-unix.el (eshell-show-elapsed-time):
* lisp/gnus/gnus-icalendar.el (gnus-icalendar-event:org-timestamp):
* lisp/gnus/gnus-int.el (gnus-backend-trace):
* lisp/gnus/gnus-sum.el (gnus-user-date):
* lisp/gnus/mail-source.el (mail-source-delete-crash-box):
* lisp/gnus/nnmaildir.el (nnmaildir--scan):
* lisp/ibuf-ext.el (ibuffer-mark-old-buffers):
* lisp/gnus/nnmaildir.el (nnmaildir--scan):
* lisp/mouse.el (mouse--down-1-maybe-follows-link)
(mouse--click-1-maybe-follows-link):
* lisp/mpc.el (mpc--faster-toggle):
* lisp/net/rcirc.el (rcirc-handler-ctcp-KEEPALIVE)
(rcirc-sentinel):
* lisp/net/tramp-cache.el (tramp-get-file-property):
* lisp/net/tramp-sh.el (tramp-sh-handle-file-newer-than-file-p)
(tramp-maybe-open-connection):
* lisp/net/tramp-smb.el (tramp-smb-maybe-open-connection):
* lisp/org/org-clock.el (org-clock-resolve):
(org-resolve-clocks, org-clock-in, org-clock-out, org-clock-sum):
* lisp/org/org-timer.el (org-timer-start)
(org-timer-pause-or-continue, org-timer-seconds):
* lisp/org/org.el (org-evaluate-time-range):
* lisp/org/ox-publish.el (org-publish-cache-ctime-of-src):
* lisp/pixel-scroll.el (pixel-scroll-in-rush-p):
* lisp/play/hanoi.el (hanoi-move-ring):
* lisp/proced.el (proced-format-time):
* lisp/progmodes/cpp.el (cpp-progress-message):
* lisp/progmodes/flymake.el (flymake--handle-report):
* lisp/progmodes/js.el (js--wait-for-matching-output):
* lisp/subr.el (progress-reporter-do-update):
* lisp/term/xterm.el (xterm--read-event-for-query):
* lisp/time.el (display-time-update, emacs-uptime):
* lisp/tooltip.el (tooltip-delay):
* lisp/url/url-cookie.el (url-cookie-parse-file-netscape):
* lisp/url/url-queue.el (url-queue-prune-old-entries):
* lisp/url/url.el (url-retrieve-synchronously):
* lisp/xt-mouse.el (xterm-mouse-event):
Avoid double-rounding of time-related values.  Simplify.
* lisp/calendar/icalendar.el (icalendar--decode-isodatetime):
When hoping for the best (unlikely), use a better decoded time.
(icalendar--convert-sexp-to-ical): Avoid unnecessary encode-time.
* lisp/calendar/timeclock.el (timeclock-when-to-leave):
* lisp/cedet/ede/detect.el (ede-detect-qtest):
* lisp/desktop.el (desktop-create-buffer):
* lisp/emacs-lisp/benchmark.el (benchmark-elapse):
* lisp/gnus/gnus-art.el (article-lapsed-string):
* lisp/gnus/gnus-group.el (gnus-group-timestamp-delta):
* lisp/gnus/nnmail.el (nnmail-expired-article-p):
* lisp/gnus/nnmaildir.el (nnmaildir-request-expire-articles):
* lisp/nxml/rng-maint.el (rng-time-function):
* lisp/org/org-clock.el (org-clock-get-clocked-time)
(org-clock-resolve, org-resolve-clocks, org-resolve-clocks-if-idle):
* lisp/org/org-habit.el (org-habit-insert-consistency-graphs):
* lisp/progmodes/vhdl-mode.el (vhdl-update-progress-info)
(vhdl-fix-case-region-1):
Use time-since instead of open-coding most of it.
* lisp/erc/erc-dcc.el (erc-dcc-get-sentinel):
* lisp/erc/erc.el (erc-string-to-emacs-time, erc-time-gt):
Now obsolete.  All uses changed.
(erc-time-diff): Accept all Lisp time values.
All uses changed.
* lisp/gnus/gnus-demon.el (gnus-demon-idle-since):
* lisp/gnus/gnus-score.el (gnus-score-headers):
* lisp/gnus/nneething.el (nneething-make-head):
* lisp/gnus/nnheader.el (nnheader-message-maybe):
* lisp/gnus/nnimap.el (nnimap-keepalive):
* lisp/image.el (image-animate-timeout):
* lisp/mail/feedmail.el (feedmail-rfc822-date):
* lisp/net/imap.el (imap-wait-for-tag):
* lisp/net/newst-backend.el (newsticker--image-get):
* lisp/net/rcirc.el (rcirc-handler-317, rcirc-handler-333):
* lisp/obsolete/xesam.el (xesam-refresh-entry):
* lisp/org/org-agenda.el (org-agenda-show-clocking-issues)
(org-agenda-check-clock-gap, org-agenda-to-appt):
* lisp/org/org-capture.el (org-capture-set-target-location):
* lisp/org/org-clock.el (org-clock-resolve-clock)
(org-clocktable-steps):
* lisp/org/org-colview.el (org-columns-edit-value)
(org-columns, org-agenda-columns):
* lisp/org/org-duration.el (org-duration-from-minutes):
* lisp/org/org-element.el (org-element-cache-sync-duration)
(org-element-cache-sync-break)
(org-element--cache-interrupt-p, org-element--cache-sync):
* lisp/org/org-habit.el (org-habit-get-faces)
* lisp/org/org-indent.el (org-indent-add-properties):
* lisp/org/org-table.el (org-table-sum):
* lisp/org/org-timer.el (org-timer-show-remaining-time)
(org-timer-set-timer):
* lisp/org/org.el (org-babel-load-file, org-today)
(org-auto-repeat-maybe, org-2ft, org-time-stamp)
(org-read-date-analyze, org-time-stamp-to-now)
(org-small-year-to-year, org-goto-calendar):
* lisp/org/ox.el (org-export-insert-default-template):
* lisp/ses.el (ses--time-check):
* lisp/type-break.el (type-break-time-warning)
(type-break-statistics, type-break-demo-boring):
* lisp/url/url-cache.el (url-cache-expired)
(url-cache-prune-cache):
* lisp/vc/vc-git.el (vc-git-stash-snapshot):
* lisp/erc/erc-match.el (erc-log-matches-come-back):
Simplify.

Remove some timestamp format assumptions

Don’t assume that current-time and plain encode-time return
timestamps in (HI LO US PS) format.
* lisp/gnus/gnus-art.el (article-make-date-line)
(article-lapsed-string):
* lisp/gnus/gnus-demon.el (gnus-demon-time-to-step):
* lisp/gnus/gnus-diary.el (gnus-user-format-function-d):
* lisp/gnus/nnmaildir.el (nnmaildir-request-expire-articles):
* lisp/net/pop3.el (pop3-uidl-dele):
* lisp/org/ox-publish.el (org-publish-sitemap):
* lisp/vc/vc-hg.el (vc-hg-state-fast):
Simplify and remove assumptions about timestamp format.
* lisp/gnus/gnus-art.el (article-lapsed-string):
* lisp/gnus/gnus-diary.el (gnus-user-format-function-d):
Do not worry about time-subtract returning nil; that's not possible.
* lisp/gnus/gnus-diary.el (gnus-user-format-function-d):
Avoid race due to duplicate current-time calls.
* lisp/vc/vc-hg.el (vc-hg--time-to-integer): Remove; no longer used.

which-function: Do not display outdated imenu information

* lisp/progmodes/which-func.el (which-function): Check
  `add-log-current-defun' before imenu. Update `imenu--index-alist' if
  needed. Bug#33695

; * etc/NEWS: Fix last change.

Handle HTML 'ol' start attribute in shr.el

* lisp/net/shr.el (shr-tag-ol): Don't automatically assume
1-indexing for all ordered lists, use <ol> if given.

* etc/NEWS: Announce change in shr behavior.

* test/data/shr/ol.html:
* test/data/shr/ol.txt: New test data files.

* lisp/vc/diff-mode.el: Reduce redundancy in diff-syntax-fontify code

(diff--iterate-hunks): New function extracted from diff--font-lock-refined.
(diff--font-lock-refined, diff--font-lock-syntax): Use it.
(diff--overlay-auto-delete): Rename from diff--font-lock-refine--refresh.
(diff--font-lock-syntax--refresh): Delete.
(diff-syntax-fontify-hunk): Don't completely silence errors.
(diff-syntax-fontify-props): Remove `no-init` arg, testing if `file` is
nil instead.  Adjust all callers.
(diff-syntax-fontify-props): Remove redundant code since we don't
modify the buffer.

Replace 8-bit-specific case-manipulation

* lisp/completion.el (cmpl-coerce-string-case):
Rewrite case-changing code written for ASCII or latin-1 but not valid
in generally today.

Correct implementation of `sql-set-product-feature' (Bug#30494).

* lisp.progmodes/sql.el (sql-add-product): Correct argument spec.
(sql-set-product-feature): Handle all cases as intended.
(sql-get-product-feature): Fetch varaiable value by `eval'.
* test/lisp/progmodes/sql-tests.el (sql-test-feature-value-[a-d]):
New test variables.
(sql-test-product-feature-harness): New test macro.
(sql-test-add-product, sql-test-add-existing-product)
(sql-test-set-feature, sql-test-set-indirect-feature)
(sql-test-set-existing-feature)
(sql-test-set-existing-indirect-feature)
(sql-test-set-missing-product, sql-test-get-feature)
(sql-test-get-indirect-feature, sql-test-get-missing-product)
(sql-test-get-missing-feature)
(sql-test-get-missing-indirect-feature): New ERT tests

; Merge from origin/emacs-26

The following commit was skipped:

4c6d17a (tag: emacs-26.1.92, origin/emacs-26) Bump Emacs version to 2...

Merge from origin/emacs-26

ff9c962 ; * lisp/ldefs-boot.el: Update.
b4a251c * ; ChangeLog.3 update
d3104e3 * etc/AUTHORS: Update.
a19bfb7 Remove .art from the default list of ImageMagick extensions
6985caa Fix input after setting x-wait-for-event-timeout nil
715388a Fix two warnings in eshell.texi
d49cdd9 * lisp/minibuffer.el (completion-table-dynamic): Improve docs...
5dc4e51 * lisp/emacs-lisp/debug.el (debug-on-variable-change): Doc fi...
76ef805 Fix a typo in ELisp manual
b5e66f4 Update citations of Internet RFCs
57ece2a Fix handling of manpage references divided by hyphenation
7ad0cd6 * doc/misc/eshell.texi: Fix some @ref's.
12b7940 Fix a typo in lispref/syntax.texi

# Conflicts:
# lisp/gnus/nnrss.el
# lisp/mail/ietf-drums.el

Bump Emacs version to 26.1.92

* README:
* configure.ac:
* msdos/sed2v2.inp:
* nt/README.W32: Bump Emacs version to 26.1.92.

; * lisp/ldefs-boot.el: Update.

* ; ChangeLog.3 update

* etc/AUTHORS: Update.

Fix missing interactive spec

* lisp/json.el (json-pretty-print-buffer-ordered): Add interactive
  spec "P" which has been missing.

Improve connection hand-shaking in tramp-adb.el

* lisp/net/tramp-adb.el (tramp-adb-maybe-open-connection):
Send an additional RET.

* lisp/progmodes/sql.el (sql-is-indent-available): Remove

(sql-indent-enable): Check (fboundp 'sqlind-minor-mode) without
wondering which file might provide it.
(sql-read-connection): η-reduce 'car'.

Fix handling of MINIBUF argument in 'walk-window-tree'

* lisp/window.el (walk-window-tree): Handle MINIBUF argument
as advertised when FRAME is minibuffer-only.
(window--resize-apply-p, window--sanitize-window-sizes)
(delete-other-windows, split-window-sensibly): Call
'walk-window-tree' with suitable MINIBUF argument.

Remove .art from the default list of ImageMagick extensions

It seems that .art files can be non-image files that
ImageMagick mistakenly treats as extremely large images.
Real .art images seem rare.
* lisp/image.el (imagemagick-enabled-types): Remove ART.  (Bug#22289)

* lisp/progmodes/sql.el: Fix use of string-empty-p in recent change.

Fix input after setting x-wait-for-event-timeout nil

* src/w32term.c (x_make_frame_visible): Call unblock_input
before returning early.  (Bug#34575)

Simplify easy-mmode-define-navigation

* lisp/emacs-lisp/easy-mmode.el (easy-mmode-define-navigation):
Simplify a one-argument call to "or" and use buffer-narrowed-p instead
of checking that condition by hand.

Implement access-file in Tramp

* lisp/net/tramp-adb.el (tramp-adb-file-name-handler-alist):
* lisp/net/tramp-archive.el (tramp-archive-file-name-handler-alist):
* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-handler-alist):
* lisp/net/tramp-rclone.el (tramp-rclone-file-name-handler-alist):
* lisp/net/tramp-sh.el (tramp-sh-file-name-handler-alist)
* lisp/net/tramp-smb.el (tramp-smb-file-name-handler-alist):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler-alist):
Add `access-file'.

* lisp/net/tramp-archive.el (tramp-archive-handle-access-file):
* lisp/net/tramp.el (tramp-handle-access-file): New defun.
(tramp-condition-case-unless-debug): Add declaration.
(tramp-handle-insert-directory):
* lisp/net/tramp-sh.el (tramp-sh-handle-insert-directory):
* lisp/net/tramp-smb.el (tramp-smb-handle-insert-directory):
Check, whether directory is accessible.

* test/lisp/net/tramp-archive-tests.el
(tramp-archive-test17-insert-directory)
(tramp-archive-test18-file-attributes):
* test/lisp/net/tramp-tests.el (tramp-test17-insert-directory)
(tramp-test18-file-attributes): Test error cases.

cycle-sort-function prevails in completion-all-sorted-completions

* lisp/minibuffer.el (completion-all-sorted-completions): If
completion table has cycle-sort-function, that prevails over other
sorting strategies.

switch-to-buffer's completion table uses its own sorting

* src/minibuf.c (Finternal_complete_buffer): Add
Qcycle_sort_function to completion table's metadata.
(syms_of_minibuf): New symbol Qcycle_sort_function.

Fix two warnings in eshell.texi

* doc/misc/eshell.texi (Built-ins, Globbing): Fix `.' or `,'
must follow @xref, not `f' warnings.

Merge branch 'wallet'

* lisp/progmodes/sql.el: Added password wallet using
`auth-source' package.
(sql-auth-source-search-wallet): New function.
(sql-password-wallet): New variable.
(sql-password-search-wallet-function): New variable.
(sql-get-login): Handle password wallet search.
(sql-product-interactive): Handle password function.
* test/lisp/progmodes/sql-test.el: Test wallet changes.
(sql-test-login-params): New test variable.
(with-sql-test-connect-harness): New macro to wrap test
configuration around calls to `sql-connect'.
(sql-test-connect, sql-test-connect-password-func)
(sql-test-connect-wallet-server-database)
(sql-test-connect-wallet-database)
(sql-test-connect-wallet-server): New ERT tests.
* etc/NEWS: Updated SQL Mode descriptions.

* lisp/mh-e/mh-acros.el (mh-defstruct): Minor simplification

* lisp/erc/erc.el (erc-version-string): Remove, unused

* lisp/progmodes/sql.el defensive programming

(sql-statement-regexp): if 'ansi' dialect is not defined, use "select"
(sql-interactive-mode): establish process sentinel iff there is a
process. Default values for :prompt-regexp and :prompt-length.
(sql-product-interactive): only check process status iff there is a
process.

* lisp/elec-pair.el: Do modify+undo more carefully

(electric-pair-inhibit-if-helps-balance): Use the undo system
instead of undoing by hand.

Speed up cl-list-length

* lisp/emacs-lisp/cl-extra.el (cl-list-length): Use ‘length’
to do the real work; this is simpler and uses a better algorithm.

Minor profiler improvements

* src/profiler.c (evict_lower_half, record_backtrace)
(setup_cpu_timer, cmpfn_profiler, hashfn_profiler):
Assume C99.  Use bool for boolean.
(timer_getoverrun): Remove; simplify use to not need it.
(Fprofiler_cpu_start): Any negative return from setup_cpu_timer fails.
(Fprofiler_cpu_stop): Simplify initialization.

* lisp/emacs-lisp/cl-lib.el (cl-endp): Move to cl-seq.el

Use 'cl-check-type'.

* lisp/minibuffer.el (completion-table-dynamic): Improve docstring

Use 'timer_getoverrun' on Cygwin when possible

* configure.ac: Add a check for the 'timer_getoverrun' function.

* src/profiler.c [CYGWIN] : Define 'timer_getoverrun' as a
macro only on versions of Cygwin where it is not already
defined as a function.

* lisp/emacs-lisp/debug.el (debug-on-variable-change): Doc fix.  (Bug#34518)

Copyright-paperwork-exempt: yes

* lisp/vc/smerge-mode.el (smerge-change-buffer-confirm): New var

(smerge-vc-next-conflict): Obey it.  Save buffer before going to
the next.  Don't emit message when vc-find-conflicted-file can't find
other conflicted file.

* lisp/vc/vc-hooks.el: Use lexical-binding.

* lisp/vc/vc.el: Remove redundant :groups.
(vc-find-conflicted-file): Autoload.

* lisp/vc/smerge-mode.el (smerge-vc-next-conflict): New command

Copyright-paperwork-exempt: yes

Increase timeout on emba for Tramp

* test/lisp/net/tramp-tests.el
(tramp--test-shell-command-to-string-asynchronously):
Increase timeout on emba.

* src/fns.c: Fix comment.

emacs-init-time outputs more digits now

* lisp/time.el (emacs-init-time): Output more digits;
formerly this was always outputting "0.0 seconds" for me
because the number of seconds was less than 0.1.

* lisp/emacs-lisp/cl-lib.el (cl-endp): Remove stray 'x.

* lisp/tar-mode.el (tar--try-jka-compr): Remove.  (Bug#34251)

(tar-extract): Call archive-try-jka-compr instead of tar--try-jka-compr.

* lisp/arc-mode.el (archive-try-jka-compr): Call set-buffer-multibyte
after erase-buffer.

Fontify C function identifiers in parentheses correctly (e.g. in lisp.h)

Fix handling of CC Mode's syntactic WS cache.  Make noise-macro option
variables buffer local.

* lisp/progmodes/cc-engine.el (c-put-is-sws, c-put-in-sws, c-remove-is-sws)
(c-remove-in-sws c-remove-is-and-in-sws): Add edebug specs.
(c-invalidate-sws-region-before): Add a `beg' parameter.  Handle noise
macros like other literals.
(c-invalidate-sws-region-after-del): Move the adjustment of (cdr
c-sws-lit-limits) due to buffer change to c-invalidate-sws-region-after.
(c-invalidate-sws-region-after-ins): Move (goto-char end) to the correct
place.
(c-invalidate-sws-region-after): Adjust (cdr c-sws-lit-limits) due to buffer
change.  Handle noise macros.
(c-backward-sws): Set simple-ws-beg appropriately when the start point is in
the middle of a noise macro.
(c-forward-decl-or-cast-1): Recognize a function identifier being declared in
parentheses.

* lisp/promodes/cc-mode.el (c-before-change): Supply a `beg' argument to
c-invalidate-sws-region-before.

* lisp/progmodes/cc-vars.el (c-noise-macro-with-parens-name-re)
(c-noise-macro-name-re, c-noise-macro-names, c-noise-macro-with-parens-names):
Make these buffer local variables.

* Put INLINE and ATTRIBUTE_NO_SANITIZE_UNDEFINED into c-noise-macro-names

* .dir-locals (entry for c-mode): Put the two strings into
c-noise-macro-names.

Fix a typo in ELisp manual

* doc/lispref/abbrevs.texi (Abbrev Table Properties): Fix a
typo.  (Bug#34508)

Update citations of Internet RFCs

For example, RFC 822 has been obsoleted by RFC 2822, which in
turn has been obsoleted by RFC 5322.
* doc/emacs/ack.texi, doc/lispref/os.texi:
* doc/misc/emacs-mime.texi, doc/misc/gnus-coding.texi:
* doc/misc/gnus.texi, doc/misc/sc.texi:
* lisp/calendar/parse-time.el, lisp/gnus/gnus-cite.el:
* lisp/gnus/gnus-util.el, lisp/gnus/message.el:
* lisp/gnus/mm-bodies.el, lisp/gnus/nnrss.el:
* lisp/mail/feedmail.el, lisp/mail/ietf-drums.el:
* lisp/mail/mail-extr.el, lisp/mail/mail-utils.el:
* lisp/mail/mailclient.el, lisp/mail/mailheader.el:
* lisp/mail/rfc2047.el, lisp/mail/rfc822.el, lisp/mail/rmail.el:
* lisp/mail/sendmail.el, lisp/mail/smtpmail.el:
* lisp/mail/supercite.el, lisp/mh-e/mh-e.el:
* lisp/mh-e/mh-utils.el, lisp/net/imap.el:
* lisp/net/newst-backend.el, lisp/org/org-id.el:
* lisp/ps-samp.el, lisp/simple.el, lisp/url/url-util.el:
Update RFC citations.

* src/lread.c (readevalloop): Simplify via suffix_p.

* lisp/startup.el (load--user-init-file): Support early-init.elc as well.

* lisp/startup.el: Rename load-user-init-file

Remove redundant :groups.
(startup--load-user-init-file): Rename from load-user-init-file.

Prevent over-eager rx character range condensation

`rx' incorrectly considers character ranges between ASCII and raw bytes to
cover all codes in-between, which includes all non-ASCII Unicode chars.
This causes (any "\000-\377" ?Å) to be simplified to (any "\000-\377"),
which is not at all the same thing: [\000-\377] really means
[\000-\177\200-\377] (Bug#34492).

* lisp/emacs-lisp/rx.el (rx-any-condense-range): Split ranges going
from ASCII to raw bytes.
* test/lisp/emacs-lisp/rx-tests.el (rx-char-any-raw-byte): Add test case.
* etc/NEWS: Mention the overall change (Bug#33205).

Fix handling of manpage references divided by hyphenation

* lisp/man.el (Man-reference-regexp): Accept a newline as part
of a manpage name only if it's preceded by a hyphen.  (Bug#34286)
(Man-translate-references): Adapt to change in
'Man-reference-regexp'.
(Man-default-man-entry): Support references divided between
two lines by an ASCII hyphen.  This is a left-over from fixing
bug#6289.

Port tramp-adb to various 'touch' platforms

* lisp/net/tramp-adb.el (tramp-adb-handle-set-file-times):
Try nanoseconds first, then plain seconds, then touch -t.

* doc/misc/eshell.texi: Fix some @ref's.

Copyright-paperwork-exempt: yes

Fix 'early-init-file' value when file is missing

* lisp/startup.el (command-line): Pass 'early-init.el', with
an explicit .el extension, to load-user-init-file.
Reported by Radon Rosborough <radon.neon@gmail.com> in
http://lists.gnu.org/archive/html/emacs-devel/2019-01/msg00314.html.

Fix a typo in lispref/syntax.texi

* doc/lispref/syntax.texi (Syntax Table Internals): Fix a
typo.  (Bug#34495)

* lisp/progmodes/cc-engine.el: Remove unneeded require of 'cl'

Merge branch 'master' of git+ssh://git.sv.gnu.org/srv/git/emacs into trunk

* src/lread.c (readevalloop): Use filename to decide macroexpansion

* test/lisp/textmodes/conf-mode-tests.el (conf-test-align-assignments):
Fix whitespace.

Merge from origin/emacs-26

f721084 (origin/emacs-26) Avoid errors in erc-dcc.el when erc-dcc-ver...
3cba92d Fix faces in compilation messages

; Merge from origin/emacs-26

The following commit was skipped:

834ca18 * doc/misc/eshell.texi (Built-ins): Fix alias description

Merge from origin/emacs-26

25d9fe2 Work for empty MIME attachments (related to bug#34387)

; Merge from origin/emacs-26

The following commits were skipped:

58e0e92 Backport: js-indent-align-list-continuation: Make variable safe
6d89120 Avoid crashes upon C-g in nested invocations of 'read_char'

Merge from origin/emacs-26

3f4b8e9 * src/data.c (Fmake_local_variable): Fix bug#34318
b384996 Minor fixes in ELisp manual wrt syntax-table properties
71fc6d2 * admin/notes/emba: New file.
3aaa2d2 Fix Hunspell invocation for discovering its dictionaries

# Conflicts:
# test/src/data-tests.el

* lisp/progmodes/compile.el: Remove redundant :groups

(compilation-shell-minor-mode, compilation-minor-mode): Use :lighter
rather than the old positional args.
(compilation-next-error): Make "No error here" into a user-error.

Make ls-lisp.el behave like Posix hosts when directory doesn't exist

* lisp/ls-lisp.el (ls-lisp-insert-directory): For a directory
that cannot be accessed, signal an error, like insert-directory
does on Posix systems.  This causes files-tests.el to pass on
MS-Windows.

Support ~USER for some names on MS-Windows

* src/w32.c (getpwnam): Support usernames provided through
LOGNAME or USERNAME environment variables, to mimic what
editfns.c:init_editfns does.

Add basic conf-mode tests

* test/lisp/textmodes/conf-mode-tests.el: New file with tests for
conf-mode.  Mostly taken from conf-mode docstrings.  (Bug#34419)

Use lexical binding for conf-mode

* lisp/textmodes/conf-mode.el: Use lexical binding.
(conf-align-assignments, conf-quote-normal, conf-mode-initialize):
Doc fix.  (Bug#34419)

Add documentation for last change in eww.el

* doc/misc/eww.texi (Basics): Document the prefix arg effect
on "M-x eww".  (Bug#34374)

* etc/NEWS: Mention the change in behavior of 'eww'.

* lisp/net/eww.el (eww): With prefix arg, open url in new buffer.

Bug#34374

Avoid errors in erc-dcc.el when erc-dcc-verbose is non-nil

* lisp/erc/erc-dcc.el (erc-dcc-get-filter): Don't assume STR
is always a string.  Use 'buffer-name' to get the DCC file
name, as buffer-file-name is not set in the process buffer.

Copyright-paperwork-exempt: yes

Fix faces in compilation messages

* lisp/progmodes/compile.el (compilation-parse-errors): Don't
clobber the value of TYPE inside the loop.  (Bug#34479)

Copyright-paperwork-exempt: yes

* doc/misc/eshell.texi (Built-ins): Fix alias description

Dear eamcs developers, eshells current documentation first states
that alias definitions are not saved to an alias file, later that
they are saved to an alias file.  I tested it and the latter is
correct.

Please find attached a patch which fixes this.

Thanks for working on emacs which is really great, Gregor

>From 1fe51cc769ab7a30d0896fb3d6105c0561243fa7 Mon Sep 17 00:00:00 2001
From: Gregor Zattler <telegraph@gmx.net>
Date: Wed, 13 Feb 2019 20:19:38 +0100
Subject: * doc/misc/eshell.texi (Built-ins): Fix alias description.

Bring description of built-in 'alias' in line with (info "(eshell) Aliases"),
which describes the actual behaviur.

(cherry picked from commit a48099ce7ff63cda416a870766fe61f5b8ac7c2c)

Change scoring strategy for 'flex' completion style

The previous strategy had problems comparing scores of matches to
strings of different lengths.  This one seems slightly more sensible,
and uses a new constant `flex-score-match-tightness' instead of the
more abstract `flex-score-falloff'.

It's not completely without problems, and I think it shouldn't count
"holes" at the front and at the back, but that needs a different
"pattern-to-regexp" conversion in completion-pcm--hilit-commonality.

(defun test ()
  (mapcar (lambda (a)
            (cons (substring-no-properties a)
                  (get-text-property 0 'completion-score a)))
          (sort (completion-pcm--hilit-commonality
                  '(prefix "f" star "o" star "o" point)
                  '("foo"
                    "barfoobaz"
                    "foobarbaz"
                    "barbazfoo"
                    "fabrobazo"
                    "foot"
                    "foto"
                    "fotttttttttttttttttttttttto"))
      (lambda (a b)
        (> (get-text-property 0 'completion-score a)
           (get-text-property 0 'completion-score b))))))

(let ((flex-score-match-tightness 100)) (test))
=> (("foo" . 1.0)
    ("foot" . 0.375)
    ("foto" . 0.375)
    ("foobarbaz" . 0.16260162601626016) ;; one hole
    ("barbazfoo" . 0.16260162601626016) ;; one hole
    ("barfoobaz" . 0.10964912280701755) ;; two holes
    ("fabrobazo" . 0.10964912280701755) ;; two holes
    ("fotttttttttttttttttttttttto" . 0.04982561036372696))

(let ((flex-score-match-tightness 0.1)) (test))
=> (("foo" . 1.0)
    ("foot" . 0.375)
    ("foto" . 0.375)
    ("barfoobaz" . 0.007751937984496124) ;; two holes
    ("fabrobazo" . 0.007751937984496124) ;; two holes
    ("foobarbaz" . 0.00641025641025641)  ;; one hole
    ("barbazfoo" . 0.00641025641025641)  ;; one hole
    ("fotttttttttttttttttttttttto" . 0.0004789272030651341))

* lisp/minibuffer.el (flex-score-falloff): Rename to
flex-score-match-tightness.
(completion-pcm--hilit-commonality): Update function.

Add categories L, R, SPC and . to `rx' doc string

* lisp/emacs-lisp/rx.el (rx): Add new categories to doc string.

Use lexical-binding in rx.el

* lisp/emacs-lisp/rx.el: Use lexical-binding.
(rx-form): Use `let' to bind the dynamic variable `rx-parent' instead
of binding it as an argument.

* lisp/minibuffer.el (completion-styles-alist): Tweak flex's docstring

Adapt tramp-adb-handle-set-file-times

* lisp/net/tramp-adb.el (tramp-adb-handle-set-file-times):
Use 'touch -d', 'touch -t' does not seem to work.  Use Universal Time.

; * etc/NEWS (New 'flex' completion style): New entry

Work for empty MIME attachments (related to bug#34387)

* mm-view.el (mm-inline-text):
Make undisplayer do nothing if the part is empty.

* mm-decode.el (mm-copy-to-buffer): Work for empty MIME part.
* mml.el (mime-to-mml): Ditto.