feat(cgit-taz): Add patches for subtree about/ handling

1. Generate links to subtree about pages.
2. Render README files in subtrees, too.

web/cgit-taz/0003-cgit_subtree_about_links.patch

@@ -0,0 +1,50 @@
+From 531b55dc96bb7ee2ce52a3612021e1c1f4ddac8a Mon Sep 17 00:00:00 2001
+From: Vincent Ambo <tazjin@google.com>
+Date: Sat, 21 Dec 2019 23:27:28 +0000
+Subject: [PATCH 3/3] feat(ui-shared): Generate links to about pages from
+ subtrees
+
+If you're on tree/foo/bar, the about link will now point to
+about/foo/bar.
+
+Currently the annoying thing about this is that it will also do it for
+files.
+---
+ ui-shared.c | 14 ++++++++++----
+ 1 file changed, 10 insertions(+), 4 deletions(-)
+
+diff --git a/ui-shared.c b/ui-shared.c
+index c7c3754..c37835a 100644
+--- a/ui-shared.c
++++ b/ui-shared.c
+@@ -297,6 +297,12 @@ void cgit_tag_link(const char *name, const char *title, const char *class,
+ 	reporevlink("tag", name, title, class, tag, NULL, NULL);
+ }
+ 
++void cgit_about_link(const char *name, const char *title, const char *class,
++		    const char *head, const char *rev, const char *path)
++{
++	reporevlink("about", name, title, class, head, rev, path);
++}
++
+ void cgit_tree_link(const char *name, const char *title, const char *class,
+ 		    const char *head, const char *rev, const char *path)
+ {
+@@ -985,10 +991,10 @@ void cgit_print_pageheader(void)
+ 
+ 	html("<table class='tabs'><tr><td>\n");
+ 	if (ctx.env.authenticated && ctx.repo) {
+-		if (ctx.repo->readme.nr)
+-			reporevlink("about", "about", NULL,
+-				    hc("about"), ctx.qry.head, NULL,
+-				    NULL);
++		if (ctx.repo->readme.nr) {
++			cgit_about_link("about", NULL, hc("about"), ctx.qry.head,
++					 ctx.qry.sha1, ctx.qry.vpath);
++		}
+ 		cgit_summary_link("summary", NULL, hc("summary"),
+ 				  ctx.qry.head);
+ 		cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
+-- 
+2.24.1.735.g03f4e72817-goog
+