master updated (db03eda636 -> 02b180e955)

[Po Lu]

oldosfan pushed a change to branch master.

      from  db03eda636 Merge branch 'feature/long-lines-and-font-locking'
       new  ee93a06b8b Implement monitor refresh rate synchronization on X
       new  acefbcf835 Minor additions to last change
       new  02b180e955 ; * src/xterm.c (x_update_begin): Fix build without DBE.


Summary of changes:
 doc/emacs/xresources.texi |   4 +-
 etc/NEWS                  |  11 ++++-
 src/xfns.c                |  21 +++++++-
 src/xmenu.c               |  23 +++++----
 src/xterm.c               | 121 ++++++++++++++++++++++++++++++++++++++--------
 src/xterm.h               |  25 ++++++++++
 6 files changed, 174 insertions(+), 31 deletions(-)