2.13.0.5 stuff:

Note: Some users have been complaining that GDM 2.13.0.4 core dumps when the
      IncludeAll feature is turned on, and the face browser is also being used.
      I can not recreate this problem on my machine, so this issue may still
      exist on some platforms.

- GDM now supports secure remote login which can be enabled by using
  --enable-securelogin at configure time.  (Dominique Hazael-Massieux)
  
- Fixed gdmsetup so the Logo/Background file chooser does not generate assert
  warnings and no longer will reset your logo/background to NULL.  I think this
  problem was causing occasional core dumping issues.  Also cleaned up memory
  management in gdmsetup a bit.  (Brian Cameron)

- Now SELinux initialization logic does not use setexeccon if 
  is_selinux_enabled returns -1.  (Dan Walsh)

- The prefetch logic that is enabled by using --with-prefetch was improved
  and GDM will now install a default librarylist if the feature is enabled.
  Now GDM will only launch the gdm_prefetch program the first time that a
  greeter is displayed.  Since this behavior is very specific to the needs
  of prefetching libraries, the gdm.conf key changed from PostDisplayProgram
  to PreFetchProgram.  (Padraig O'Briain/Brian Cameron)

- GDM no longer requires libgnome or libgnomeui at all.  This should improve
  GDM performance and make GDM more lightweight.  (Jani Monoses)

- GDM Daemon now uses the GDK_DISPLAY_XDISPLAY macro instead of the 
  GDK_DISPLAY macro since the GDK_DISPLAY macro causes the GDM daemon to
  require the libgdk-x11 library to always be loaded into memory.  Now it can
  lazyload this library only when needed (when GDM daemon displays error GUI's
  which only happens when GDM can't start up properly).  This should improve
  performance and make GDM more lightweight for the normal case where GDM does
  start up.  (Brian Cameron)

- Minor cleanup of gdmsetup.  (Dennis Cranston)

- Caps lock and Shut down messages changed to be more consistant between
  gdmlogin and gdmgreeter.  Error message provided when session file is 
  invalid now tells you the name of the offending file.  (Brian Cameron)

- GDM docs given some attention, new "Security" and "Performance" sections and
  a good bit of information added to the "Introduction" and "Accessibility"
  sections.  (Brian Cameron)

- Translation updates (Takeshi AIHANA, Chao-Hsiung Liao,
  Theppitak Karoonboonyanan, Kjartan Maraas, Ankit Patel, Josep Puigdemont,
  Ignacio Casal Quinteiro, Francisco Javier F. Serrador, Clytie Siddall,
  Alexander Sopov, Slobodan D. Sredojevic, Ilkka Tuohela, Vincent van Adrighem,
  Adam Weinberger