* Route::PDF::Cairo bugfix: begin a new page only if there's something
  to print

  Previously it was possible to have a blank extra page.
* a bbbike+munin favicon, to be used in /etc/munin/templates/favicon.ico
* data update (mainly in Hohenschoenhausen)
* cgi: don't send ETag anymore

  The ETag was not used correctly, and partially it was superfluous:
  - the language is anyway part of the URL
  - the user agent should be handled by the Vary header
  - and the bbbike.cgi version is largely useless, because the
    $VERSION is incremented quite infrequently, and probably the
    .modified timestamp would be more useful in most situation.

  Also, with using ETag headers like If-None-Match should be handled
  correctly, which is not the case.
* MANIFEST update