instances of MixMonitor on a channel.
------------------------------------------------------------------------------
+--- Functionality changes from Asterisk 12 to Asterisk 12.1 ------------------
+------------------------------------------------------------------------------
+
+ARI
+------------------
+ * Added a new ARI resource 'mailboxes' which allows the creation and
+ modification of mailboxes managed by external MWI. Modules res_mwi_external
+ and res_stasis_mailbox must be enabled to use this resource.
+
+chan_pjsip
+------------------
+ * Path support has been added with the 'support_path' option in registration
+ and aor sections.
+
+------------------------------------------------------------------------------
--- Functionality changes from Asterisk 11 to Asterisk 12 --------------------
------------------------------------------------------------------------------