disabled logging dropped events

darcs-hash:20081107123738-b2873-12c5a351748cb2eff41647c04173f9173b1e8eaf
sip_msrp_client.py: copy-pasted option parsing from sip_msrp_im_session.py instead of importing them

darcs-hash:20081107123759-b2873-4f885b6eea6b29d2a3b3d281d193604d094418b8