Reset hangup flags on channels created through messages and cleanup globals

in res_xmpp on unload.

This patch fixes an issue where hangup flags were not being reset on a
channel, affecting subsequent use of that channel. The patch also adds some
additional cleanup to res_xmpp to fix an issue with reloading the module.

(closes ASTERISK-20360)
Reported by: Noah Engelberth 
Tested by: beagles
Review: https://reviewboard.asterisk.org/r/2134/
........

Merged revisions 374019 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@374020 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/message.c

@@ -752,6 +752,10 @@ static void chan_cleanup(struct ast_channel *chan)
 	if (msg_ds) {
 		ast_channel_datastore_add(chan, msg_ds);
 	}
+	/*
+	 * Clear softhangup flags.
+	 */
+	ast_channel_clear_softhangup(chan, AST_SOFTHANGUP_ALL);
 
 	ast_channel_unlock(chan);
 }

res/res_xmpp.c

@@ -4204,6 +4204,8 @@ static int unload_module(void)
 	ast_manager_unregister("JabberSend");
 	ast_custom_function_unregister(&jabberstatus_function);
 	ast_custom_function_unregister(&jabberreceive_function);
+	aco_info_destroy(&cfg_info);
+	ao2_global_obj_release(globals);
 
 	ast_cond_destroy(&message_received_condition);
 	ast_mutex_destroy(&messagelock);