Merge from origin/emacs-26

Merge from origin/emacs-26

28e0261890 * lisp/progmodes/cc-defs.el (c-version): Update to 5.33.1.
ac53084f9b Improve fix for Bug#29712
ffd4771560 * doc/lispref/sequences.texi (Sequence Functions): Improve...
f274cbd185 Avoid reordering of output in 'shr-insert-document'
7890864413 Improve documentation of 'invisible-p'
a1327bbc64 Remove one more check that Vframe_list is non-nil
63b6281fdd Fix off-by-one error in 'css--hex-color'
804b37ca63 Save and restore text-pixel height and width of frames (Bu...
777fe94661 Partially revert "Mention new strictness for &optional, &r...
ad17db7964 * lisp/vc/smerge-mode.el (smerge-refine): Respect font-loc...
5a7d0095a4 * lisp/vc/smerge-mode.el (smerge-refine): Replace obsolete...
e019c35df6 FOR_EACH_FRAME no longer assumes frame-list
d64b88da2f * src/font.c (Ffont_info): Doc fix.  (Bug#29682)
92b2604a7f Modernise message.el face spec syntax
b1efbe6564 Update message.el obsolete face aliases
2494c14e76 ; * lisp/comint.el (comint-terminfo-terminal): Add a :vers...
12ad276d15 Improve documentation of TERM environment variable
8ed529f0f3 Add option to configure comint TERM
889f07c352 Better support utf-8-with-signature and utf-8-hfs in XML/HTML
a2697fac0e * lisp/menu-bar.el (menu-bar-mode): Doc fix.
ffb50eace6 ; * etc/NEWS: Fix last change.
95606af8b0 Fix Bug#29712 in tramp-tests.el
9bf66c6bee Don't run FOR_EACH_FRAME when there's no frame left (Bug#2...
c2a88ec8e8 * lisp/textmodes/tex-mode.el: Ensure uncompiled file is lo...
b178870528 Remember password change for IMAP in Gnus (Bug#29692)
a21dac18bb Add %DUMBFW to the default GnuTLS priority strings
780407cff1 Small fixes prompted by make check-declare
541a60108d Fix some custom groups
e220d6e112 Fix fontification of first declaration within a C++ lambda...
aa66da220c * src/data.c (Fadd_variable_watcher): Doc fix.
f838210b01 Fix misfontification of C++ member initialization list aft...
232c6465ce Fix doc-string of Fbuffer_list
3f9aac68d7 Don't raise an extraneous frame (bug#29696)
e7b1111155 Mention new strictness for &optional, &rest in arglists (B...
4cb8696e47 Don't misfontify "foo ()" inside C++ initialization parent...
ce31e726ad Fixes for defcustoms, prompted by cus-test-opts
aacd1e14fc * lisp/net/newst-backend.el (newsticker--raw-url-list-defa...
7e2f4d3d41 * lisp/htmlfontify.el (hfy-which-etags): Fix it.
52d2a690f6 Add missing :version tags revealed by cusver-check
f5d0360234 Escape column-zero doc parens

# Conflicts:
#	etc/NEWS