[PATCH] file capabilities: don't prevent signaling setuid rootprograms.

[Serge E. Hallyn]

This patch is needed to preserve legacy behavior when
CONFIG_SECURITY_FILE_CAPABILITIES=y.  Without this patch, xinit can't
kill X, so manually starting X in runlevel 3 then exiting your window
manager will not cause X to exit. 

thanks,
-serge