Allow permit/deny ACL lines to contain multiple items and negated entries.

Rules in ACLs (specified using 'permit' and 'deny') can now contain multiple
items (separated by commas), and items in the rule can be negated by prefixing
them with '!'. This simplifies Asterisk Realtime configurations, since it is no
longer necessray to control the order that the 'permit' and 'deny' columns are
returned from queries.

Review: https://reviewboard.asterisk.org/r/1592/
Initial patch contributed by Tilghman Lesher
Unit tests written by Kevin P. Fleming



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370426 65c4cc65-6c06-0410-ace0-fbb531ad65f3