Update error description for DNS failures

darcs-hash:20090626210039-58252-398dd537113fc9afc6d64e3b31fbf976c5037d77
Added PJSIP patch that prevents PJSIP DNS error in some stituations

darcs-hash:20090630155712-58103-64dbf3bcb01d715f38dcae34c872d5715e54d330