• Use combined IPv4/IPv6 lookup from NetworkUtils
• Remove unused code
• Defer server connection until registering
• Directly access the registrar connection
• Remove a no longer thrown exception
• Remove unused field accessors, inline proxy string generation
• Remove dead code and unused exceptions
• Move registrar expiration timeout to registrar connection class
• Avoid unnecessary DNS lookups for SIP
• Add mock libraries to classpath
• Updates keepalive implementation to detect uplink drops. Use of XEP-0199 xmpp ping. Fix jabber authorization ignore.