Merge branch 'jn/web'

* jn/web:
  gitweb: Finish restoring "blob" links in git_difftree_body
  gitweb: Refactor feed generation, make output prettier, add Atom feed
  gitweb: Add an option to href() to return full URL
  gitweb: New improved formatting of chunk header in diff
  gitweb: Default to $hash_base or HEAD for $hash in "commit" and "commitdiff"
  gitweb: Buffer diff header to deal with split patches + git_patchset_body refactoring
  gitweb: Protect against possible warning in git_commitdiff

gitweb/gitweb.css

@@ -334,11 +334,13 @@ div.diff.extended_header {
 	padding: 2px 0px 2px 0px;
 }
 
+div.diff a.list,
 div.diff a.path,
 div.diff a.hash {
 	text-decoration: none;
 }
 
+div.diff a.list:hover,
 div.diff a.path:hover,
 div.diff a.hash:hover {
 	text-decoration: underline;
@@ -362,14 +364,25 @@ div.diff.rem {
 	color: #cc0000;
 }
 
+div.diff.chunk_header a,
 div.diff.chunk_header {
 	color: #990099;
+}
 
+div.diff.chunk_header {
 	border: dotted #ffe0ff;
 	border-width: 1px 0px 0px 0px;
 	margin-top: 2px;
 }
 
+div.diff.chunk_header span.chunk_info {
+	background-color: #ffeeff;
+}
+
+div.diff.chunk_header span.section {
+	color: #aa22aa;
+}
+
 div.diff.incomplete {
 	color: #cccccc;
 }