replace: allow long option names

It is now standard practice in Git to have both short and long option
names. So let's give a long option name to the git replace options too.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-replace.txt

@@ -54,13 +54,16 @@ achieve the same effect as the `--no-replace-objects` option.
 OPTIONS
 -------
 -f::
+--force::
 	If an existing replace ref for the same object exists, it will
 	be overwritten (instead of failing).
 
 -d::
+--delete::
 	Delete existing replace refs for the given objects.
 
 -l <pattern>::
+--list <pattern>::
 	List replace refs for objects that match the given pattern (or
 	all if no pattern is given).
 	Typing "git replace" without arguments, also lists all replace

builtin/replace.c

@@ -128,9 +128,9 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
 {
 	int list = 0, delete = 0, force = 0;
 	struct option options[] = {
-		OPT_BOOLEAN('l', NULL, &list, N_("list replace refs")),
-		OPT_BOOLEAN('d', NULL, &delete, N_("delete replace refs")),
-		OPT_BOOLEAN('f', NULL, &force, N_("replace the ref if it exists")),
+		OPT_BOOLEAN('l', "list", &list, N_("list replace refs")),
+		OPT_BOOLEAN('d', "delete", &delete, N_("delete replace refs")),
+		OPT_BOOLEAN('f', "force", &force, N_("replace the ref if it exists")),
 		OPT_END()
 	};