ui-shared: add homepage to tabs

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
diff --git a/ui-shared.c b/ui-shared.c
index 03dcc08..2c91e75 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -997,6 +997,11 @@
 		if (ctx.repo->max_stats)
 			cgit_stats_link("stats", NULL, hc("stats"),
 					ctx.qry.head, ctx.qry.vpath);
+		if (ctx.repo->homepage) {
+			html("<a href='");
+			html_attr(ctx.repo->homepage);
+			html("' target='_blank'>homepage</a>");
+		}
 		html("</td><td class='form'>");
 		html("<form class='right' method='get' action='");
 		if (ctx.cfg.virtual_root) {