Move local.server.ServerEngine to core packages
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brent_thomson
The ServerEngine could be the core of a lot lf different server implementations and belongs in the core packages, not the demo stuffs. There are likely other classes that will have to be moved along with ServerEngine.
The code in that class needs to be cleaned up a lot, too.
The appropriate package for these classes might be org.jjsip.sip.server (server doesn't exist yet).