Merge from origin/emacs-27

Merge from origin/emacs-27

09eed01afb Wrap some set-auto-mode calls with delay-mode-hooks (bug#3...
4a0a114505 Support ido-vertical-mode better
ef5fba9f40 Fix faces tab-bar and tab-line.
831508422e Cater for 3-argument version of pthread_setname_np
f27187f963 Clarify lexvar restrictions for add-to-ordered-list, add-t...
32763dac46 Replace add-to-list to lexical variable with push (bug#39373)
d07f177382 Clarify add-to-list documentation (bug#39373)
d3d2ea927c MH-E: alter content in mh-display-msg, not mh-show-mode
db7fa2546f Update documentation for mh-show-mode-hook
d10be6bf28 Example goto-addr hook: MH-E already uses goto-address

# Conflicts:
#	etc/NEWS