Rename dirlink to gitlink.

Git changed from dirlink to gitlink in
302b9282c9ddfcc704ca759bdc98c1d5f75eba2f.

Signed-off-by: Jeffrey C. Ollie <jeff@ocjtech.us>

html.c

@@ -158,7 +158,7 @@ void html_filemode(unsigned short mode)
 		html("d");
 	else if (S_ISLNK(mode))
 		html("l");
-	else if (S_ISDIRLNK(mode))
+	else if (S_ISGITLINK(mode))
 		html("m");
 	else
 		html("-");

ui-diff.c

@@ -37,7 +37,7 @@ static void header(unsigned char *sha1, char *path1, int mode1,
 	char *abbrev1, *abbrev2;
 	int subproject;
 
-	subproject = (S_ISDIRLNK(mode1) || S_ISDIRLNK(mode2));
+	subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));
 	html("<div class='head'>");
 	html("diff --git a/");
 	html_txt(path1);
@@ -78,10 +78,10 @@ static void filepair_cb(struct diff_filepair *pair)
 {
 	header(pair->one->sha1, pair->one->path, pair->one->mode,
 	       pair->two->sha1, pair->two->path, pair->two->mode);
-	if (S_ISDIRLNK(pair->one->mode) || S_ISDIRLNK(pair->two->mode)) {
+	if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
-		if (S_ISDIRLNK(pair->one->mode))
+		if (S_ISGITLINK(pair->one->mode))
 			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
-		if (S_ISDIRLNK(pair->two->mode))
+		if (S_ISGITLINK(pair->two->mode))
 			print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
 		return;
 	}

ui-tree.c

@@ -20,7 +20,7 @@ static int print_entry(const unsigned char *sha1, const char *base,
 
 	name = xstrdup(pathname);
 	type = sha1_object_info(sha1, &size);
-	if (type == OBJ_BAD && !S_ISDIRLNK(mode)) {
+	if (type == OBJ_BAD && !S_ISGITLINK(mode)) {
 		htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
 		      name,
 		      sha1_to_hex(sha1));
@@ -29,7 +29,7 @@ static int print_entry(const unsigned char *sha1, const char *base,
 	html("<tr><td class='filemode'>");
 	html_filemode(mode);
 	html("</td><td ");
-	if (S_ISDIRLNK(mode)) {
+	if (S_ISGITLINK(mode)) {
 		htmlf("class='ls-mod'><a href='");
 		html_attr(fmt(cgit_repo->module_link,
 			      name,