Current support for regex matching was previously only available on the group.
Also, error reporting for regex failures has been added. In addition to this
feature enhancement a unit test has been written to check the regular expression
logic to ensure the count operation is working as expected.

(closes issue #16642)
Reported by: kobaz
Patches: 
      groupmatch2.patch uploaded by kobaz (license 834)

Review: https://reviewboard.asterisk.org/r/503/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@247295 65c4cc65-6c06-0410-ace0-fbb531ad65f3