Fixed timeout of Request.send

Ignore-this: 7e5fa2170cb5aa8386e27ea8c321468a

darcs-hash:20100126161453-1e3d8-72b5f3a351b2aa69f48a03ada7d1a1f3b7da5b0c
Don't try to use a MSRP Relay if URL is empty

Ignore-this: 45e576c9be5108a668f8b1e04bd793e6

darcs-hash:20100127153912-56b4d-f774549fdf5455c0a09303da77da5cb500c1980c