Prepare for removal of DBGet/DBPut manager commands, by allowing Getvar to get functions (Setvar can already set functions)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@8078 65c4cc65-6c06-0410-ace0-fbb531ad65f3

manager.c

@@ -745,7 +745,11 @@ static int action_getvar(struct mansession *s, struct message *m)
 		}
 	}
 
-	pbx_retrieve_variable(c, varname, &varval, workspace, sizeof(workspace), NULL);
+	if (varname[strlen(varname) - 1] == ')') {
+		varval = ast_func_read(c, varname, workspace, sizeof(workspace));
+	} else {
+		pbx_retrieve_variable(c, varname, &varval, workspace, sizeof(workspace), NULL);
+	}
 
 	if (c)
 		ast_mutex_unlock(&c->lock);