gtk2/gtk3

[Eric Lindblad]

   from emacs-26.1 maybe this is just outdated configure script content

   either of '--with-x-toolkit=gtk2' or '--with-x-toolkit=gtk3' produce
   this shell output

   configure: WARNING: Your version of Gtk+ will have problems with
   closing open displays.  This is no problem if you just use
   one display, but if you use more than one and close one of them
   Emacs may crash.

   what the following from bugzilla [dot] gnome [dot] org/show_bug [dot]
   cgi?id=85715

   is supposed to mean is unclear

   Status: RESOLVED OBSOLETE

   the emacs-26.1 configure script (near line 12500) is were the warning
   is written

   if this was attended to, i.e., no longer an issue, perhaps the
   configure script should be updated

   or please inform if it is still an issue for gtk2 and gtk3