tor/tor_conf:
 * fix generation of torrc, EntryNodes/ExitNodes-options don't contain extra comma at the end anymore, problem reported in [http://www.ip-phone-forum.de/showthread.php?t=261982 this] and [http://www.ip-phone-forum.de/showthread.php?t=263485 this] thread
 * minor cleanups


git-svn-id: file:///var/svn/freetz/trunk@11119 149334a1-2f27-0410-a3b9-fc62619ac1e6