[Gta04-owner] v3.16-rc6

[Neil Jerram]

FYI I merged and tried v3.16-rc6 yesterday evening.  I didn't have time 
to explore deeply, but it appears to behave very similarly to -rc5.

Also I'm now using a systemd userspace, as provided by latest Debian 
testing.  The boot with systemd is very fast, and systemctl is a nice 
tool for seeing general state, including any services that failed for 
some reason.

Probably the most notable problem for me, with this setup (with both 
-rc5 and -rc6), is that the X server periodically gets a segfault and 
restarts; this happens roughly every 2-5 minutes.  If anyone has any 
ideas about that, please share.

Regards,
      Neil