Log Message:
Update to 3.20130904.1. From the changelog:

* calendar: Display the popup mouseover when there is only 1 page for a
  given day, for better UI consistency.
* meta: Can now be used to add an enclosure to a page, which is a fancier
  way to do podcasting than just inlining the media files directly;
  this way you can write a post about the podcast episode with show notes,
  author information, etc.
  (schmonz)
* aggregate: Show author in addition to feedname, if different.
  (schmonz)
* Consistently configure LWP::UserAgent to allow use of http_proxy
  and no_proxy environment variables, as well as ~/.ikiwiki/cookies
  (schmonz)
* Fix test suite to work with perl 5.18. Closes: #719969
* Fix cookiejar default setting.