(closes issue #13564)

Reported by: mnicholson
Patches:
      pbx_lua9.diff uploaded by mnicholson (license 96)

Many thanks to Matt for his upgrade to the lua dialplan
option! 

the Description from the bug:

This patch adds a stack trace to errors encountered while executing lua extensions. The patch also handles out of memory errors reported by lua.




git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@144681 65c4cc65-6c06-0410-ace0-fbb531ad65f3