* libmisc/user_busy.c, src/userdel.c, src/usermod.c: Warn in

user_busy() rather than in src/userdel.c or src/usermod.c to
	provide more accurate failure cause (user is logged in or user
	still executes processes).

src/usermod.c

@@ -1735,9 +1735,6 @@ int main (int argc, char **argv)
 	 */
 	if (   (uflg || lflg || dflg)
 	    && (user_busy (user_name, user_id) != 0)) {
-		fprintf (stderr,
-		         _("%s: user %s is currently logged in\n"),
-		         Prog, user_name);
 		exit (E_USER_BUSY);
 	}