do not print stactrace for ConnectionRefused and other errors

darcs-hash:20081128082434-b2873-a756ab130cc8419966ea5a17e4b093071768c758
renamed msrp_relay_address to msrp_relay in config.ini.sample

darcs-hash:20081128105603-b2873-df70e4810a835bcbe0798981f78cc96121d46ff1