id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
264	use new IHandshakeListener	Brian Warner		"Twisted-16.4.0 was just released, and includes an interface named `IHandshakeListener`. When a protocol implements this, it's `handshakeCompleted` method will be called just after TLS negotiation finishes.

This might simplify some code in negotiate.py.
"	task	new	minor	undecided	negotiation	0.12.0