as.xml: remove default settings.

This removes:
  * useddsfanart;
  * network.cachemembuffersize;
  * samba.clienttimeout.
WIP: Remove unmodified files.

* .bash_logout, .profile get copied by useradd -md.
* RssFeeds.xml had default feeds, with a different URL pointing to FeedBurner
  vs xbmc.org.
* profiles.xml had default values.
* thumbnails get regenerated on first run.  Also, these were not expensive at all.
WIP: Remove a bunch of add-ons shipped with XBMC.

There's no point in duplicating them here.  If there's an update XBMC will by
default install it automatically, so...
WIP: [debian] Update conffiles after 14865a170a205d4df4f6ae93e3cb1d34251f1e34.