fix clients/config.py not to set msrp relay if using bonjour

darcs-hash:20090316144122-b2873-5dc5ceb44c98c1f7805cb8bae3734b6220f8e73a
fix sip_im_session2.py to respect command-line relay parameters

darcs-hash:20090316144154-b2873-dbcc8661dd8a185eef2c209db657d9b0093f6245