GNU SIP Witch 0.5.3

GNU SIP Witch is a call and registration server for the SIP protocol. As a call server it services call registration for SIP devices and destination routing through SIP gateways.
GNU SIP Witch supports using secure telephone extensions, for placing and receiving b2b calls directly over the internet, and intercept/decrypt-free peer-to-peer audio and video extensions.
The initial public release of GNU SIP Witch (0.1.0) offers support of SIP registration, multi-target registration, authentication peering over SIP, registration querying of user agents, basic call processing between registered user agents only including call distribution for multi-target registrations, and basic SIP instant messaging between registered extensions.
GNU SIP Witch is not a SIP "router", and does not try to address the same things as a project like iptel "Ser".
GNU SIP Witch is being designed to create on-premise SIP telephone systems, telecenter servers, and Internet hosted SIP telephone systems.
GNU SIP Witch depends on the UCommon library, which may merge with and become GNU Common C++ 2.0 later this year or early next year. CVS for and new distributions of UCommon will be found in the GNU Telecom project on an interim basis until then.
GNU SIP Witch also uses libeXosip2 and GNU oSIP, and these may be found at their respective sites.

Enhancements
- SIP publish can be forwarded through plugins. Forward plugin publishes status to insecure calling domain.