confbridge: Separate user muting from system muting overrides.

The system overrides the user muting requests when MOH is playing or a
waitmarked user is waiting for a marked user to join.  System muting
overrides interfere with what the user may wish the muting to be when the
system override ends.

* User muting requests are now independent of the system muting overrides.
The effective muting is now the logical or of the user request and system
override.

* Added a Muted flag to the CLI "confbridge list <conference>" command.

* Added a Muted header to the AMI ConfbridgeList action ConfbridgeList
event.

(closes issue AST-1102)
Reported by: John Bigelow

Review: https://reviewboard.asterisk.org/r/2960/
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Merged revisions 402425 from http://svn.asterisk.org/svn/asterisk/branches/11
........

Merged revisions 402427 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@402428 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/confbridge/include/confbridge.h

@@ -242,6 +242,7 @@ struct confbridge_user {
 	struct ast_bridge_features features;         /*!< Bridge features structure */
 	struct ast_bridge_tech_optimizations tech_args; /*!< Bridge technology optimizations for talk detection */
 	unsigned int suspended_moh;                  /*!< Count of active suspended MOH actions. */
+	unsigned int muted:1;                        /*!< Has the user requested to be muted? */
 	unsigned int kicked:1;                       /*!< User has been kicked from the conference */
 	unsigned int playing_moh:1;                  /*!< MOH is currently being played to the user */
 	AST_LIST_HEAD_NOLOCK(, post_join_action) post_join_list; /*!< List of sounds to play after joining */;
@@ -384,6 +385,15 @@ int play_sound_file(struct confbridge_conference *conference, const char *filena
  */
 void conf_ended(struct confbridge_conference *conference);
 
+/*!
+ * \brief Update the actual mute status of the user and set it on the bridge.
+ *
+ * \param user User to update the mute status.
+ *
+ * \return Nothing
+ */
+void conf_update_user_mute(struct confbridge_user *user);
+
 /*!
  * \brief Stop MOH for the conference user.
  *