Fix portability issue with make-serial-process

* src/sysdep.c (struct speed_struct): New struct.
(speeds): New static array of struct speed_struct.
(convert_speed): New static function to convert a numerical baud
rate (e.g., 9600) to a Bnnn constant defined in termios.h (e.g.,
B9600).
(serial_configure): Use convert_speed to make the call to cfsetspeed
compliant with its advertised API.  (Bug#49524)

; * doc/lispref/intro.texi (Caveats): Fix paren.

Fix a problem with tramp-*-process-file

* lisp/net/tramp-adb.el (tramp-adb-handle-process-file):
* lisp/net/tramp-sh.el (tramp-sh-handle-process-file):
* lisp/net/tramp-smb.el (tramp-smb-handle-process-file):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-process-file):
Use `(expand-file-name default-directory)'.

Port test module to glibc 2.33

* test/Makefile.in (REPLACE_FREE, FREE_SOURCE_0, FREE_SOURCE_1):
New macros.
($(test_module)): Improve accuracy of test as to whether free.c
should be compiled; glibc 2.33 does not need it compiled and the
compilation breaks if you try, if you build with
--enable-gcc-warnings.

Pacify gcc 11.1.1 -Wclobbered

* src/eval.c (Fprogn, internal_lisp_condition_case):
Add CACHEABLE to work around more instances of -Wclobbered bug.

Pacify gcc 11.1.1 -Wanalyzer-possible-null-dereference

* oldXMenu/Create.c (XMenuCreate):
* oldXMenu/Internal.c (_XMRecomputePane, _XMRecomputeSelection):
* oldXMenu/XMakeAssoc.c (XMakeAssoc):
* test/src/emacs-module-resources/mod-test.c (Fmod_test_userptr_make):
Don’t assume that malloc and calloc succeed.

Pacify gcc 11.1.1 -Wanalyzer-null-argument

* lib-src/etags.c (regexp): Omit member force_explicit_name,
since it’s always true.  All uses removed.  This lets us
remove calls to strlen (name) where GCC isn’t smart enough
to deduce that name must be nonnull.
* lib-src/movemail.c (main): Fix bug that could cause
link (tempname, NULL) to be called.
* src/emacs.c (argmatch): Break check into two ‘if’s,
since GCC doesn’t seem to be smart enough to check the single ‘if’.
* src/gtkutil.c (xg_update_menu_item): Fix bug where strcmp
could be given a NULL arg.
* src/xfont.c (xfont_list_family): Use nonnull value for dummy
initial value.

Pacify gcc -Woverflow more nicely

* src/alloc.c (mark_maybe_pointer): Simplify pacification
of gcc -Woverflow (unknown GCC version).

* lisp/textmodes/enriched.el: Require 'facemenu' (bug#49466)

Further tweaks to gnus-search-query-expand-key

* lisp/gnus/gnus-search.el (gnus-search-query-expand-key): It's
possible that KEY could be partially completed (ie no longer string=
to COMP), but not all the way. Use a more accurate test. Add
docstring.

Use `auto-save-file-name-p' in tramp-*-write-region

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-write-region):
Use `auto-save-file-name-p'.

Fix compilation of the --with-wide-int configuration

* src/alloc.c (mark_maybe_pointer): Fix a recent change for
WIDE_EMACS_INT builds.  (Bug#49261)

; Fix misspellings of 'occurrence' in docs.

; * doc/lispref/text.texi (Substitution): Fix a recent change.

Pacify GCC 11.1.1 20210531 (Red Hat 11.1.1-3)

* src/image.c (xpm_load_image):
* src/xfns.c (x_icon):
Rework to pacify gcc -Wmaybe-uninitialized.

Make pdumper-marking pickier

Prevent some false-positives in conservative GC marking.
This doesn’t fix any correctness bugs; it’s merely to
reclaim some memory instead of keeping it unnecessarily.
* src/alloc.c (mark_maybe_pointer): New arg SYMBOL_ONLY.
All callers changed.  Check that the pointer’s tag, if any,
matches the pdumper-reported type.

Fix pdumper-related GC bug

* src/alloc.c (mark_maybe_pointer): Also mark pointers
to pdumper objects, even when the pointers are tagged.
Add a FIXME saying why this isn’t enough.

Rewrite gnus-search-query-expand-key

* lisp/gnus/gnus-search.el (gnus-search-query-expand-key): There was a
misunderstanding about how completion-all-completion works (if the
test string can't be completed, the whole table is returned). Simplify
to use try-completion.
* test/lisp/gnus/gnus-search-tests.el (gnus-s-expand-keyword): Ensure
that an unknown/uncompletable keyword is returned unmolested.

Rework gnus-search-indexed-parse-output

* lisp/gnus/gnus-search.el (gnus-search-indexed-parse-output): Be more
careful about matching filesystem paths to Gnus group names; make
absolutely sure that we only return valid article numbers.

* src/buffer.c (kill-buffer): Fix a typo.

* src/buffer.c (Fkill_buffer): Fix typo in comment.

doc/lispref/text.texi (Substitution): Add subst-char-in-string

* doc/lispref/text.texi (Substitution): Document
subst-char-in-string (bug#49420).

Make package-menu-filter-by-status work as documented

* lisp/emacs-lisp/package.el (package-menu-filter-by-status): Work
as documented (bug#49474).

Skip a process test on Cygwin to avoid hang

* test/src/process-tests.el
(process-tests/fd-setsize-no-crash/make-network-process): Skip
test on Cygwin to avoid hang due to connect/accept handshake.
(Bug#49496)

* lisp/facemenu.el: Preload the C-mouse-2 menu binding

Further cleanup for file locks

* doc/misc/tramp.texi (Top, Configuration): Adapt node name for
file locks.
(Auto-save File Lock and Backup): Rename node name and section
title.  Add file-lock to @cindex.  Describe file locks.

* lisp/dired.el (dired-trivial-filenames): Add lock files.
(dired-font-lock-keywords): Move files suffixed with
`completion-ignored-extensions' up.  Add lock files to these checks.

* lisp/net/tramp.el (tramp-get-lock-file, tramp-handle-unlock-file):
Use `when-let'
(tramp-lock-file-info-regexp): Rename from
`tramp-lock-file-contents-regexp'.
(tramp-handle-file-locked-p, tramp-handle-lock-file): Adapt callees.
(tramp-handle-lock-file): Set file modes of lockname.

* src/buffer.c (Frestore_buffer_modified_p):
* src/fileio.c (write_region):
* src/insdel.c (prepare_to_modify_buffer_1): Call Flock_file.

* src/filelock.c (Qmake_lock_file_name): Declare symbol.
(make_lock_file_name): Use it.  Don't check Fboundp, it doesn't
work for interned symbols.
(lock_file): Return a Lisp_Object.  Don't check create_lockfiles.
Remove MSDOS version of the function.
(Flock_file): Check create_lockfiles.
(Flock_buffer): Call Flock_file.

* src/lisp.h (lock_file): Remove.

* test/lisp/shadowfile-tests.el (shadow-test08-shadow-todo)
(shadow-test09-shadow-copy-files): Let-bind `create-lockfiles'.

* test/lisp/net/tramp-tests.el (create-lockfiles): Don't set it
globally.
(tramp-test39-lock-file): Check also for `set-visited-file-name'.

Partially restore the lost C-mouse-2 drop-down menu

This allows to pop up the Text Properties menu once facemenu is
loaded.  It still doesn't allow C-mouse-2 clicks without manually
loading facemenu; FIXME.
* lisp/facemenu.el (global-map) <C-down-mouse-2>: Add back the
removed binding.  (Bug#49466)

* lisp/outline.el (outline-mode-cycle-map): Don't bind `tab`.

Since it would take precedence over bindings for TAB in higher
precedence maps.

* doc/lispref/files.texi (Magic File Names): Add make-lock-file-name.

Code cleanup wrt file locks

* lisp/files.el (make-lock-file-name): Fix docstring.

* 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-crypt.el (tramp-crypt-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-sshfs.el (tramp-sshfs-file-name-handler-alist):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler-alist):
Add `make-lock-file-name'.

* lisp/net/tramp.el (tramp-file-name-for-operation):
Add `make-lock-file-name'.
(tramp-handle-unlock-file): Call `userlock--handle-unlock-error'
in case of error.

* src/buffer.c (Frestore_buffer_modified_p):
* src/editfns.c (Freplace_buffer_contents):
* src/fileio.c (Finsert_file_contents, write_region): Call Funlock_file.

* src/filelock.c (unlock_file): Rename from unlock_file_body.
Remove the other declarations of unlock_file.  Move file name
handler check to ...
(Funlock_file): ... here.  Adapt argument numbers.  Call
unlock_file wrapped by internal_condition_case.
(Flock_file): Adapt argument numbers.
(unlock_all_files, Funlock_buffer, unlock_buffer): Call Funlock_file.

* src/lisp.h (unlock_file): Remove.

Don't turn mouse-1 into mouse-2 when clicking on the tab-line (bug#49247)

* lisp/tab-line.el (tab-line-tab-name-format-default): For 'tab-line-tab-map'
add the property 'follow-link' with the value 'ignore'.

Use display-buffer with re-builder (bug#49069)

* lisp/emacs-lisp/re-builder.el (re-builder): Uses 'display-buffer'
with 'display-buffer-in-direction' to display the reb-buffer.  This
allow user-customizations and using it on not splitables windows.
Add a dedication to its window so killing this buffer quit the window.

Make desktop-kill more robust

* lisp/desktop.el (desktop-kill): Allow exiting Emacs even if we
can't delete the desktop file (bug#20762).

Allow inhibiting inserting #! in sh-set-shell

* lisp/progmodes/sh-script.el (sh-set-shell): Allow inhibiting
inserting the #! line (bug#20959).

Avoid making backup files in ediff when `make-backup-files' is nil

* lisp/vc/ediff-util.el (ediff-arrange-autosave-in-merge-jobs):
Don't make backup files when `make-backup-files' is nil (bug#21599).

Make ido-mode override ffap-file-finder

* lisp/ffap.el: Autoload so that we can override in ido (bug#21980).

* lisp/ido.el (ido-everywhere): Override ffap-file-finder.

Some further adaptions wrt Tramp file name locks

* lisp/files.el (files--transform-file-name): Rename from
`auto-save--transform-file-name'.  Wrap with `save-match-data'.
(make-auto-save-file-name): Use it.
(make-lock-file-name): Use it.  Call file name handler.

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
Suppress file lock for temporary file.

* lisp/net/tramp-compat.el (tramp-compat-make-lock-file-name):
New defalias.

* lisp/net/tramp.el (tramp-get-lock-file)
(tramp-handle-lock-file, tramp-handle-unlock-file): Use it.
(tramp-make-lock-name): Remove.

* test/lisp/filenotify-tests.el (file-notify-test03-events-remote):
Tag it :unstable temporarily.

Exclude term-mode from hi-lock global modes

* lisp/hi-lock.el (hi-lock-exclude-modes): Exclude term-mode so
that `C-x' works in terminal buffers (bug#22620).

Fix font-lock of Makefile variables at the start of lines

* lisp/progmodes/make-mode.el (makefile-var-use-regex): Match
variables at the beginning of lines correctly (bug#23266).  Change
suggested by Anders Lindgren <andlind@gmail.com>.

Mention what happens with timers when the computer is asleep

* doc/lispref/os.texi (Timers): Explain what happens if the
computer is a asleep when the timer is scheduled (bug#23929).

Make make_lock_file_name more robust

* src/filelock.c (make_lock_file_name): Protect against the
make-lock-file-name not being defined.
(lock_file, unlock_file_body, Ffile_locked_p): Return early if not
defined.

* lisp/faces.el: Fix a typo.

Fix last change

* lisp/faces.el (tty-menu-enabled-face, tty-menu-disabled-face):
Define for monochrome displays.

Add new user option lock-file-name-transforms

* doc/emacs/files.texi (Interlocking): Mention
lock-file-name-transforms.

* doc/lispref/files.texi (File Locks): Document
lock-file-name-transforms.

* doc/misc/efaq.texi (Not writing files to the current directory):
Mention all the three variables needed to not having Emacs writing
files to the current directory in one place.

* lisp/files.el (lock-file-name-transforms): New user option (bug#49261).
(make-auto-save-file-name): Factor out the main logic...
(auto-save--transform-file-name): ... to this new function.
(make-lock-file-name): New function that also calls the
factored-out function.

* src/filelock.c: Remove MAKE_LOCK_NAME and fill_in_lock_file_name.
(make_lock_file_name): New utility function that calls out to Lisp
to heed `lock-file-name-transforms'.
(lock_file): Use it.  Also remove likely buggy call to
dostounix_filename.
(unlock_file_body, Ffile_locked_p): Also use make_lock_file_name.

Fix tty menus on monochrome displays

* lisp/faces.el (tty-menu-selected-face): Make sure the selected
menu item stands out even without colors.

Implement file locks for remote files (Bug#49261)

* doc/lispref/files.texi (Magic File Names): Add file-locked-p,
lock-file and unlock-file.

* etc/NEWS: Tramp supports file locks now.

* lisp/net/tramp-adb.el (tramp-adb-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-adb-handle-write-region): Handle LOCKNAME.

* lisp/net/tramp-archive.el (tramp-archive-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.

* lisp/net/tramp-crypt.el (tramp-crypt-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-crypt-handle-file-locked-p, tramp-crypt-handle-lock-file)
(tramp-crypt-handle-unlock-file): New defun.

* lisp/net/tramp-fuse.el (tramp-fuse-mounted-p): Simplify.
(tramp-fuse-unmount): New defun.

* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-gvfs-maybe-open-connection): Set "lock-pid" connection property.

* lisp/net/tramp-rclone.el (tramp-rclone-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-rclone-maybe-open-connection): Set "lock-pid" connection property.

* lisp/net/tramp-sh.el (tramp-sh-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-sh-handle-write-region): Handle LOCKNAME.

* lisp/net/tramp-smb.el (tramp-smb-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-smb-handle-copy-directory): Use `sleep-for'.
(tramp-smb-handle-write-region): Handle LOCKNAME.

* lisp/net/tramp-sshfs.el (tramp-sshfs-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-sshfs-handle-write-region): Handle LOCKNAME.
(tramp-sshfs-maybe-open-connection): Set "lock-pid" connection property.

* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-sudoedit-maybe-open-connection):
Set "lock-pid" connection property.

* lisp/net/tramp.el (tramp-file-name-for-operation):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-make-lock-name, tramp-get-lock-file, tramp-get-lock-pid)
(tramp-handle-file-locked-p, tramp-handle-lock-file)
(tramp-handle-unlock-file): New defuns.
(tramp-lock-file-contents-regexp): New regexp.
(tramp-handle-write-region): Handle LOCKNAME.

* src/filelock.c (lock_file, unlock_file_body, Ffile_locked_p):
Call handler if exists.
(Flock_file, Funlock_file): New defuns.
(Qlock_file, Qunlock_file, Qfile_locked_p): Declare symbols.
(Slock_file, Sunlock_file): Declare subroutines.

* test/lisp/net/tramp-archive-tests.el
(tramp-archive-test40-make-nearby-temp-file)
(tramp-archive-test43-file-system-info): Rename.

* test/lisp/net/tramp-tests.el (top): Set `create-lockfiles' to nil.
(tramp--test-fuse-p): New defun.
(tramp-test14-delete-directory): Use it.
(tramp-test39-lock-file): New test.
(tramp-test40-make-nearby-temp-file)
(tramp-test41-special-characters)
(tramp-test41-special-characters-with-stat)
(tramp-test41-special-characters-with-perl)
(tramp-test41-special-characters-with-ls, tramp-test42-utf8)
(tramp-test42-utf8-with-stat, tramp-test42-utf8-with-perl)
(tramp-test42-utf8-with-ls, tramp-test43-file-system-info)
(tramp-test44-asynchronous-requests, tramp-test45-auto-load)
(tramp-test45-delay-load, tramp-test45-recursive-load)
(tramp-test45-remote-load-path, tramp-test46-unload): Rename.
(tramp--test-special-characters, tramp--test-utf8)
(tramp--test-asynchronous-requests-timeout): Modify docstring.

Merge from origin/emacs-27

fbf1cb2bf2 (origin/emacs-27) Fix overfull hbox in Emacs manual
fda60094a2 Minor copyedits of Emacs manual

# Conflicts:
# doc/emacs/display.texi

Make previous empty-body warning disabling more robust

* lisp/emacs-lisp/macroexp.el (macroexp--expand-all):
`byte-compile-warning-enabled-p' may not be defined here.

Avoid invalid regexp in wide docstring check

* lisp/emacs-lisp/bytecomp.el (byte-compile--wide-docstring-p):
Avoid constructing an invalid regexp during byte-compilation by
limiting the number of columns to the current RE_DUP_MAX of 65535.
This protects against pathological values of fill-column, for
example (bug#49426).

* lisp/repeat.el (describe-repeat-maps): Rename from `describe-repeat'.

Fix text strings (bug#49265).

Make `M-x clipboard-yank' work reliably

* lisp/menu-bar.el (clipboard-yank): Make the command work
consistently (bug#27442).

* lisp/select.el (gui-selection-value): Try to explain why the
logic is the way it is.

Explain what ( . c) means to the Emacs Lisp reader

* doc/lispref/objects.texi (Dotted Pair Notation): Explain what
( . c) means to the Lisp reader (bug#24875).

Fix right-margin display on TTY frames

* src/dispnew.c (prepare_desired_row, adjust_glyph_matrix): Adjust
the glyph pointer of the right-margin area for all windows but the
rightmost ones on TTY frames, to account for the border glyph.
(Bug#48257)

Warn when wrapping index matches with `,' after `i' in Info

* lisp/info.el (Info--current-index-alternative): New internal
variable.
(Info-warn-on-index-alternatives-wrap): New user option (bug#24282).
(Info-index-next): Use the new user option.

Add faces for shr heading elements (bug#49433)

* etc/NEWS: Document new faces.
* lisp/net/shr.el (shr-h1, shr-h2, shr-h3, shr-h4, shr-h5, shr-h6):
Define new faces.
(shr-tag-h1): Remove inclusion of 'variable-pitch' face.  Fix
bug#49433 by applying a new face directly.
(shr-tag-h2, shr-tag-h3, shr-tag-h4, shr-tag-h5, shr-tag-h6): Apply
new faces.

Make gnus-gcc-externalize-attachments work again

* lisp/gnus/gnus-msg.el (gnus-inews-do-gcc): Allow externalizing
parts again by defeating the cache (bug#49436).

Allow inhibiting warnings about unused variables and empty bodies

* lisp/emacs-lisp/cconv.el (cconv--warn-unused-msg): Allow
inhibiting warnings about unbound variables (bug#26486).

* lisp/emacs-lisp/macroexp.el (macroexp--expand-all): Allow
inhibiting warnings about empty bodies.

Allow using `mm-inline-message' from other mail clients than Gnus

* lisp/gnus/mm-view.el (mm-inline-message-prepare-function): New
variable (bug#49380).
(mm-inline-message): Use it to separate out the Gnus-specific code.
* lisp/gnus/gnus-art.el (gnus-mime-display-single): ... which has
been moved here.

Fix overfull hbox in Emacs manual

* doc/emacs/display.texi (Displaying Boundaries): Fix overfull
hbox.

Minor copyedits of Emacs manual

* doc/emacs/book-spine.texi: Fix the author attribution.
(Bug#49405)
* doc/emacs/back.texi: Update text.

(xref--insert-xrefs): Fix printing of line numbers

* lisp/progmodes/xref.el (xref--insert-xrefs):
Fix printing of line numbers when we have multiple files with
(e.g.) single match on the same line.

; * test/lisp/subr-tests.el (subr-tests-add-hook-depth): Fix a typo.

* lisp/progmodes/bug-reference.el: Refer to info manual node

Support reverting in Customize buffers

* lisp/cus-edit.el (custom--revert-buffer): New function (bug#26871).
(Custom-mode): Set up reversion.
(custom--invocation-options): New variable.
(custom-buffer-create-internal): Set it.

Count zero-length matches in `count-matches' correctly

* lisp/replace.el (how-many): Count zero-length matches correctly
(bug#27359).

Propagate :safe properties when autoloading defcustoms

* lisp/emacs-lisp/autoload.el (make-autoload): Propagate the :safe
property to the loaddefs file (bug#28104).

Make `bookmark--unfontify' more robust

* lisp/bookmark.el (bookmark--unfontify): Don't bug out if there's
no fontification recorded (bug#49341).

`image-save' doc string clarification

* lisp/image.el (image-save): Clarify what's being saved
(bug#49347).

Don't use LOCKNAME for temp files in Tramp (Bug#49406)

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-write-region):
Don't use LOCKNAME for temp file.  (Bug#49406)

* test/lisp/shadowfile-tests.el (password-cache-expiry):
Set `shadow-debug' also on emba.

Show hand cursor when dragging frame (Bug#49247)

* src/xdisp.c (note_mode_line_or_margin_highlight): Show hand
cursor when dragging frame with mode, tab or header line.
(syms_of_xdisp): Define Qdrag_with_mode_line,
Qdrag_with_header_line and Qdrag_with_tab_line.

Fix newly introduced error in tramp-tests.el (Bug#49406)

* test/lisp/net/tramp-tests.el (tramp--test-check-files):
Filter out empty strings.  (Bug#49406)

Ignore .dir-locals-2.el files more

* lisp/emacs-lisp/shadow.el (load-path-shadows-find):
* lisp/emacs-lisp/bytecomp.el (byte-recompile-directory): Ignore
.dir-locals-2.el, too (bug#23257).

Ensure 'call-process' interprets INFILE as a local path

* src/callproc.c (get_current_directory): Rename from
'encode_current_directory' and add boolean ENCODE flag.
(Fcall_process): Interpret INFILE relative to the working directory
from which PROGRAM is run, not 'default-directory'.
(call_process): Use 'get_current_directory'.
* src/process.c (Fmake_process): Use 'get_current_directory'.
* src/process.h (get_current_directory): Rename decl from
'encode_current_directory'.
* src/sysdep.c (sys_subshell): Use 'get_current_directory' (bug#49283).

Adjust eshell and ps-print to not use emacs-kill-hook

* lisp/ps-print.el (ps-kill-emacs-check):

* lisp/eshell/em-dirs.el (eshell-dirs-initialize)
(eshell-save-some-last-dir): Don't use `emacs-kill-hook' (bug#28943).

* lisp/eshell/em-hist.el (eshell-hist-initialize)
(eshell-save-some-history):

* lisp/url/url-util.el (url-unhex-string): Doc fix.

Avoid deprecation warnings with Texinfo 6.8

* doc/lispref/functions.texi (Function Safety):
* doc/misc/srecode.texi (Parts of SRecode):
* doc/misc/wisent.texi (Wisent Semantic, Wisent Lex):
* doc/misc/pcl-cvs.texi (Editing files):
* doc/misc/bovine.texi (top, Starting Rules)
(Bovine Grammar Rules, How Lexical Tokens Match)
(Optional Lambda Expression):
* doc/emacs/msdos.texi (Windows Keyboard):
* doc/emacs/buffers.texi (Several Buffers):
* doc/emacs/text.texi (Text): Avoid using @inforef, which is
deprecated.

Fix crash in GNUstep font coverage check

* src/nsfont.m (ns_charset_covers): Check coverage more accurately and
don't automatically assume the buffer is 8192 bytes long.

Remove unused variables

* src/nsterm.m ([EmacsView keyDown:]): Remove ns_fake_keydown as
there's no code that ever sets it to YES.

Fix thread memory management under NS

* src/thread.c (run_thread): Allocate an autorelease pool so that any
autoreleased Objective C objects are correctly released.

Update a few more IRC-related references to point to Libera.Chat

Merge from origin/emacs-27

348b2aed0c Update IRC-related references to point to Libera.Chat
b0e725e2fe Fix typo in c-macro-expand docstring

# Conflicts:
# doc/misc/erc.texi
# doc/misc/gnus-faq.texi
# doc/misc/rcirc.texi
# etc/NEWS
# lisp/erc/erc-services.el
# lisp/erc/erc.el
# lisp/ldefs-boot.el
# lisp/net/rcirc.el

; Merge from origin/emacs-27

The following commit was skipped:

d70dc6946a ; Auto-commit of loaddefs files.

Merge from origin/emacs-27

d898d3c73a ; * doc/emacs/back.texi: Fix a typo.
de52dbd4ad Update doc/emacs/ for a new printing of the Emacs Manual book

Update IRC-related references to point to Libera.Chat

Per GNU and FSF's announcements [0, 1] of moving official IRC channels
to the Libera.Chat IRC network, as well as several Emacs-related
channels following suit [2], update IRC-related references to reflect
the migration.

[0]: https://lists.gnu.org/archive/html/info-gnu/2021-06/msg00005.html
[1]: https://lists.gnu.org/archive/html/info-gnu/2021-06/msg00007.html
[2]: https://lists.gnu.org/archive/html/info-gnu-emacs/2021-06/msg00000.html

Speed up fido-mode

* lisp/icomplete.el (icomplete-completions): Speed up fido-mode (bug#48841).

Fix typo in c-macro-expand docstring

* lisp/progmodes/cmacexp.el (c-macro-expand): Fix typo.  (Bug#49356)

Retain documentation string when customizing theme

* lisp/cus-theme.el (customize-create-theme): When editing an existing
theme, load its doc string into the description widget, instead of
replacing it with a date stamp (Bug#49274).

Don't have desktop-save-mode query on `M-x kill-emacs'

* lisp/desktop.el (noninteractive): Prompting functions should not
be added to `kill-emacs-hook' (bug#28943).
(desktop-kill): Return t so that it can be used from
`kill-emacs-query-functions'.

Implement another fix for bug#49229

* lisp/minibuffer.el (read-file-name-default): Respect remote files.
(Bug#49229)

* lisp/net/tramp-sh.el (tramp-sh-handle-expand-file-name):
Handle special file names on MS Windows.

* lisp/net/tramp.el (tramp-file-name-handler): Revert patch.
(Bug#49229)

Hide emacs-mail.desktop, emacsclient-mail.desktop from menus

These are intended for use as mailto: URL handlers, not for launching
directly, so we can reduce clutter by hiding them from a desktop
environment’s menus.

* etc/emacs-mail.desktop, etc/emacsclient-mail.desktop: NoDisplay=true

Install emacs-mail.desktop and emacsclient-mail.desktop

* Makefile.in (install-etc): Install emacs-mail.desktop and
emacsclient-mail.desktop

Provide an emacsclient-mail.desktop

We provide both an emacs.desktop and an emacsclient.desktop, so for
consistency let’s do the same with mail.

* etc/emacs-mail.desktop: Extract suggestions for using emacsclient
from comments to create emacsclient-mail.desktop.
* etc/emacsclient-mail.desktop: Send mail using an existing Emacs
rather than starting a new one.

lisp/auth-source-pass.el: Keep legitimate spaces inside data

Users should be able to store a field as follows:
message: remember: Destroy the image and you will break the enemy

and later, recover the message untouched, i.e.:
"remember: Destroy the image and you will break the enemy"

* lisp/auth-source-pass.el (auth-source-pass--parse-data): Preserve
inner spaces at data.
* test/lisp/auth-source-pass-tests.el
(auth-source-pass-parse-with-colons-in-data): Add test.

; * lisp/auth-source-pass.el: Remove useless metadata

; * lisp/auth-source-pass.el: Improve docstrings

lisp/auth-source-pass.el: Support multiple hosts in search spec

* lisp/auth-source-pass.el (auth-source-pass-search): Accept a list of
strings for argument HOST.
(auth-source-pass--build-result): Rename argument HOST to HOSTS. Also
return value "host" from entry if it exists.
(auth-source-pass--find-match): Rename argument HOST to HOSTS. Iterate
over each host in HOSTS.
* test/lisp/auth-source-pass-tests.el: Add corresponding tests

Don't pass 'null-device' to 'call-process' in ispell

* lisp/textmodes/ispell.el (ispell-find-hunspell-dictionaries):
Replace 'null-device' with nil (bug#49283).  This allows running a
local ispell process when editing a buffer editing a file via Tramp.

New frame parameter 'drag-with-tab-line' (Bug#49247)

The new frame parameter 'drag-with-tab-line' allows to move
frames by dragging their topmost windows' tab line with the
mouse thus achieving a behavior similar to that provided by
the 'drag-with-header-line' parameter.

* lisp/mouse.el (mouse-drag-tab-line): New function.
(mouse-drag-frame-resize, mouse-drag-frame-move)
([tab-line down-mouse-1]): Handle tab line dragging in various
keymaps.
* doc/lispref/frames.texi (Mouse Dragging Parameters): Describe
new parameter 'drag-with-tab-line'.
* etc/NEWS: Add entry for 'drag-with-tab-line'.

Fix a problem of cus-start.el for remote default directories

* lisp/cus-start.el: Bind `default-directory' to "/" when calling
`shell-command-to-string' for a local value on DARWIN.

Fix NS self contained eln location (bug#49271)

* Makefile.in:
* configure.ac: Change eln file install location to
Contents/Frameworks.
* src/comp.c (hash_native_abi): Replace dots with underscores in the
eln install location as the macOS code-signing tool won't sign the
files if the parent directories have dots.

Fix NS native comp search path (bug#49270)

* configure.ac (NS_SELF_CONTAINED): We need to make lispdirrel the
same as lispdir when building a self contained app bundle as they're
both relative paths.