make the argument parser for commands accept quoted strings, while i'm

there make u_spawn use exec_wm (renamed to u_exec) for it's execution to
remove duplicated code.

This means constructs like this work in .cwmrc:

bind CM-t "ssh -Y 192.168.1.2 \"xterm -e top\""

or alternatively:

bind CM-t "ssh -Y 192.168.1.2 'xterm -e top'"

"in it goes" okan@.

kbfunc.c

@@ -359,7 +359,8 @@ kbfunc_exec(struct client_ctx *scratch, void *arg)
 				u_spawn(mi->text);
 				break;
 			case CWM_EXEC_WM:
-				exec_wm(mi->text);
+				u_exec(mi->text);
+				warn("%s", mi->text);
 				break;
 			default:
 				err(1, "kb_func: egad, cmd changed value!");