fixed sip_im_conference to work with msrpsession module and the latest eventlet

darcs-hash:20081230111013-b2873-bbe6e777505ba91a2b8eeb91b8044e142233c341
restored original formatting of "Chat to" line

darcs-hash:20081230114343-b2873-f2bbf97a8e159ea5365542fb26e409579219a34b