Issue #7103 (mikma)

- Don't send reply on ACK
- use "require" instead of "required" which is an unknown header
 (Partly imported from 1.2)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@25612 65c4cc65-6c06-0410-ace0-fbb531ad65f3