Add rename/mv command.
This is the logical equivalent of copy and remove, and is in fact
implemented as such. It doesn't use the remove command directly.
#header#
<title>Mercurial repositories index</title>
</head>
<body>
<h2>Mercurial Repositories</h2>
The specified repository "#repo#" is unknown, sorry.
Please go back to the main repository list page.
#footer#