add: update pathless 'add [-u|-A]' warning to reflect change of plan

We originally thought the transition would need a period where "git add
[-u|-A]" without pathspec would be forbidden, but the warning is big
enough to scare people and teach them not to use it (or, if so, to
understand the consequences).

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/add.c

@@ -328,9 +328,9 @@ static void warn_pathless_add(const char *option_name, const char *short_name) {
 	 * this is not the original behavior and can't be
 	 * changed until users trained themselves not to type
 	 * "git add -u" or "git add -A". For now, we warn and
-	 * keep the old behavior. Later, this warning can be
-	 * turned into a die(...), and eventually we may
-	 * reallow the command with a new behavior.
+	 * keep the old behavior. Later, the behavior can be changed
+	 * to tree-wide, keeping the warning for a while, and
+	 * eventually we can drop the warning.
 	 */
 	warning(_("The behavior of 'git add %s (or %s)' with no path argument from a\n"
 		  "subdirectory of the tree will change in Git 2.0 and should not be used anymore.\n"