Add RSS link to the repository index.
Index: hg/templates/index.tmpl
===================================================================
#header#
<title>#repo#: tags</title>
</head>
<body>
<div class="buttons">
<a href="?cmd=changelog;rev=#rev#">changelog</a>
<a href="?cmd=manifest;manifest=#manifest#;path=/">manifest</a>
</div>
<h2>tags:</h2>
<ul id="tagEntries">
#entries%tagentry#
</ul>
#footer#