Update Contributed Realtime Schema Files - IPv6 Addresses

This commit updates some fields in the contributed realtime schema files to
handle IPv6 addresses.

(closes issue ASTERISK-21173)
Reported by: Torrey Searle
Patches:
  realtime_sql.patch Torrey Searle (license 5334)
  asterisk-21173-update-ip-fields.diff Michael L. Young (license 5026)
........

Merged revisions 382939 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@382940 f38db490-d61c-443f-a65b-d21fe96a405b