master updated (b506c5b -> 2bc37c1)

[Glenn Morris]

gm pushed a change to branch master.

      from  b506c5b   Make mh-* XEmacs compat aliases obsolete
      adds  3c29fb7   ; * src/Makefile.in (../native-lisp): Make the long 
recipe silent.
      adds  1af00e6   Include the refcards in the release tarball
      adds  7ae7005   ; * src/composite.h (LGSTRING_FONT): Add comment about 
its role.
      adds  bb8ef1a   * lisp/tab-bar.el (tab-detach, tab-window-detach): New 
aliases.
      adds  89d64fc   Pacify GCC 10.3 -Wmaybe-uninitialized
      adds  9d8202b   Add Emacs 27 compatibility hack
      adds  65de510   ; Fix 'restore-buffer-modified-p' doc string typo
      adds  525602d   ; * etc/TODO (display): Add entry about 
Default_Ignorables.
      adds  6e83a41   ; * admin/make-tarball.txt: Should configure 
--with-native-compilation.
      adds  915e044   Use the correct label in the warning
      adds  af01b67   ; Fix spacing in previous commit
       new  2bc37c1   Merge from origin/emacs-28


Summary of changes:
 admin/make-tarball.txt       |  6 ++++++
 etc/TODO                     | 19 +++++++++++++++++++
 lisp/progmodes/xref.el       | 14 ++++++++++++++
 lisp/tab-bar.el              | 42 ++++++++++++++++++++++--------------------
 lisp/textmodes/reftex-toc.el |  4 ++--
 make-dist                    |  6 +++---
 src/Makefile.in              |  2 +-
 src/buffer.c                 |  2 +-
 src/composite.h              |  4 ++++
 src/term.c                   |  2 +-
 10 files changed, 73 insertions(+), 28 deletions(-)