Method localContact

SIP/SIPBase.h:352–354

		return format("<sip:%s@%s>",localUsername,localIP());
	}
	string localContact(string localUsername, int expires=3600) {
		return format("<sip:%s@%s>;expires=%u",localUsername,localIPAndPort(),expires);
	}
	string proxyIP() const { return mProxy.mipIP; }
	string transportName() { return string("UDP"); }	// TODO
	bool isReliableTransport() { return transportName() == "TCP"; }	// TODO