Don't add BonjourAccount to AccountManager if there is no bonjour support

Ignore-this: 4adb718faabc53cac2701ba8182651c3

darcs-hash:20130726110455-56b4d-6bcb418f4468a80e9db12af3e95ee88d5f9f7797
pjsip: Removed unneded files

Ignore-this: e083c9077c9b571ac501b8c451625da6

darcs-hash:20130805092211-56b4d-3465bb10dedcd30e6f7b4ce4bdab351c19e502c1