Update PAC forum template

I just set up my hammerhead thread and noticed that the
center tags were wrong.  Fixed!

PS2: Found a couple other typos.
PS3: There ya go MaDc0w.  ;)

Change-Id: I77f94d1e72e825d870d59651e04d80a2fc607395
Merge remote-tracking branch 'upstream/pac-4.4' into pac-4.4