Print out deprecation notice on usage output of CLI commands. (issue #8925 reported by blitzrage)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@56008 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/cli.c

@@ -1990,6 +1990,10 @@ int ast_cli_command(int fd, const char *s)
 					ast_cli(fd, "%s", e->usage);
 				else
 					ast_cli(fd, "Invalid usage, but no usage information available.\n");
+				AST_LIST_LOCK(&helpers);
+				if (e->deprecated)
+					ast_cli(fd, "The '%s' command is deprecated and will be removed in a future release. Please use '%s' instead.\n", e->_full_cmd, e->_deprecated_by);
+				AST_LIST_UNLOCK(&helpers);
 				break;
 			default:
 				AST_LIST_LOCK(&helpers);