clients.console: update the docstring

darcs-hash:20090325120228-b2873-36385a27575bf514fff6bf8f925a17f713e9dd41
sip_session.py: accept chat|audio as a possible second argument

darcs-hash:20090325120252-b2873-2ec96353dfa37d14b03e369114b95e8012960e88