Commit compromise I suggested on review 608.

Commit compromise I suggested on review 608.

This allows for multiple SRV queries to be done
from the dialplan for the same service on a single call while
still allowing one to bypass the call to SRVQUERY if they so
please.

Taking action since no comments had been left for a while.
This can easily be reverted if needed. External tests
still pass.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@257851 65c4cc65-6c06-0410-ace0-fbb531ad65f3