Modified DNSLookup to not timeout completely if NS queries fail

Ignore-this: 8acf0ca8dd6ff3a854acbbd4b57e11bd

darcs-hash:20100513094737-1e3d8-f15b5573b28d0c5a6a9a7d16ff5bc6fa374475e3
Fixed error message in SIPProxyAddress configuration data type

Ignore-this: 49a43d36cb74e831a0f8d0827cde6872

darcs-hash:20100518133408-1e3d8-ad1b5ec8b6c71ba5b5adebb47954dcb4f2f619e0