Updates all usages of ast_tcptls_session_instance to be managed by reference counts so that they only get destroyed when all threads are done using

them, and memory does not get free'd causing strange issues with SIP. 

This code was originally written by russellb in the team/group/issue_11972/ branch.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@123546 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/http.c

@@ -736,7 +736,8 @@ static void *httpd_helper_thread(void *data)
 
 done:
 	fclose(ser->f);
-	ser = ast_tcptls_session_instance_destroy(ser);
+	ao2_ref(ser, -1);
+	ser = NULL;
 
 	return NULL;
 }