Merge from origin/emacs-28

Merge from origin/emacs-28

1ccd3eb721 (origin/emacs-28) ; Fix typo in etc/NEWS
0f28ee94ac * NEWS: Mention rcirc connects to #emacs by default
aacafbe267 Refactor mh-utils-tests macro 'with-mh-test-env'
ead5c5cc51 Avoid using variable before it has been initialized
b2c50d7cf3 Clarify docstring of blink-matching-paren
d2a34cabcf ; Very minor touch-up to a recent change
36a7ce4393 ; * doc/emacs/trouble.texi (After a Crash): Fix typo.
1cd1b2835b * doc/misc/gnus.texi (Loose Threads): Use regexp-opt in ex...
9f041cdfac Bump project.el version
ad2287e659 Retain compatibility with older project.el projects
d86b2e59c7 native-comp-available-p is the definitive test
1b383ac424 Minor fix of a recently installed documentation change
4d76765b6c Fix md5 issue in recent Gnulib merge
18308b739a Tweak recent 'configure' fix

# Conflicts:
#	etc/NEWS