id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
262	allow `IConnectionHintHandler.hint_to_endpoint` to return a Deferred	Brian Warner		"`hint_to_endpoint()` should be able to return a Deferred (which fires with a tuple), rather than being required to return the tuple synchronously.

That should make #246 (the Tor handler) easier to write. I'd like it to connect to (or launch) a Tor instance first, then learn the SOCKS port, then return a SOCKS endpoint using that port.

To do this with a synchronous `hint_to_endpoint()`, it needs to create a custom Endpoint class that waits for the Tor connection/launch in its `connect()` method, so we couldn't re-use the SOCKS endpoint code.

This will require some work in `connection.TubConnector.connectToAll`, to wrap a `maybeDeferred()` around the call to `get_endpoint`, and to detect `NoLocationHintsError` differently.

(I should have done this the first time around, but it looked too hard)
"	enhancement	closed	major	0.12.0	network	0.9.1	fixed