This uses a modified version of pabelanger's patch that checks for NTLM support
instead, which was added in 0.29.0 which is what is required for
res_calendar_ews.

(closes issue #17391)
Reported by: loloski
Patches: 
      issue17391.patch.v2 uploaded by pabelanger (license 224)
Tested by: twilson


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@265793 65c4cc65-6c06-0410-ace0-fbb531ad65f3