hot stuff:
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* finish video support
* stun support
* run a user given command upon incoming calls
* support for incoming sip re-invites

low priority:
-------------

* mediastreamer re-design.
* alsa special devices
* zeroconf support for advertising services (cool stuff!)
* improve sipomatic so that it can record and replay messages.
* have the possibility to define several profiles (config files) and switch between them
