Log Message:
Update varnish to 3.0.4.

Changes since 3.0.3:
* The ACL code had a bug which could lead to false negatives.
  This has been assigned CVE-2013-4090.
* Varnish will now return an error if the client sends multiple
  Host headers.
* If the backend sent invalid gzip while using ESI, Varnish would
  in some cases assert. It now works correctly.
* TCP_NODELAY is now enabled, which should lead to performance
  improvements in some cases.

Full changelog:

  https://www.varnish-cache.org/trac/browser/doc/changes.rst