Fixed typo: 'received_proposal' instead of 'received proposal'

Ignore-this: a8dd6dc2253f8b7527db1ef2e3e4361b

darcs-hash:20100127170552-56b4d-105be75134cead5a106373cfe27007fcc299d76e
Use transport in general settings when not using a MSRP Relay

Ignore-this: 82c72732cd4bc0024e506ed9becebbb6

Previously we used 'tls' strictly.

darcs-hash:20100127180351-56b4d-47e97abbb01b136974f117b6ff6911a8fb5107ac