transport-helper: do not run git-remote-ext etc. in dashed form

Running it as "git remote-ext" and letting "git" dispatch to
"remote-ext" would just be fine and is more idiomatic.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

transport-helper.c

@@ -128,10 +128,10 @@ static struct child_process *get_helper(struct transport *transport)
 	helper->in = -1;
 	helper->out = -1;
 	helper->err = 0;
-	strvec_pushf(&helper->args, "git-remote-%s", data->name);
+	strvec_pushf(&helper->args, "remote-%s", data->name);
 	strvec_push(&helper->args, transport->remote->name);
 	strvec_push(&helper->args, remove_ext_force(transport->url));
-	helper->git_cmd = 0;
+	helper->git_cmd = 1;
 	helper->silent_exec_failure = 1;
 
 	if (have_git_dir())