Add RSS link to the repository index.
Index: hg/templates/index.tmpl
===================================================================
Handle a nonexistent repository with a 404 error.
Based on changeset
62ea868cafbfa3acb7e5dba6982ecb46a1637246 from
Vincent Wagelaar <vincent@ricardis.tudelft.nl>
in http://hannibal.lr-s.tudelft.nl/~vincent/fcgi