Fixed handling bogus TXT records for XCAP server lookups

Ignore-this: 8e4f0d5ccab46e37909e49e0e1aac06a

darcs-hash:20100926110052-56b4d-8bfbf931aea1a407e362f967eefc368dbff34c6f
Changed visibility of command and data channels to private

Ignore-this: 6c4876a4ae52c7a6a9452ceec48bcaa5

darcs-hash:20100926085331-56b4d-c7d73f75f3be1c880cf8ce1319483e29934bb244