Allow a normal session bus to be reused by applications using autolaunching

Allow a normal session bus to be reused by applications using autolaunching

2007-11-23  Sjoerd Simons  <sjoerd@luon.net>

   * tools/dbus-launch.c: let both a normal dbus-launch and an
   autolaunched bus save their parameters in X11 if possible. This makes
   the autolaunch and non-autolaunch behaviour more similar. With the
   exception that on a normal launch there will always be a new session
   bus and not being able to save parameters is not fatal. This also
   enables to launch programs directly with autolaunch (not very usefull
   though).