This patch adds support for choosing a realm based on the domain in the From or To header in the incoming request.  Eligible domains are taken from the domains list in the config file.  This functionality is enabled when domainsasrealm is enabled in the config file.

(closes issue #11361)
Reported by: arkadia
Patches:
      sip_realm_mnich_to_added_2.patch uploaded by arkadia (license 233)
Tested by: arkadia


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@211947 65c4cc65-6c06-0410-ace0-fbb531ad65f3