Log Message:
Update loggerhead to 1.18.1.
(contains security fix for CVE-2011-0728).

What's changed in loggerhead?
=============================

1.18.1 [24Mar2011]
------------------

    - Fix escaping of filenames in revision views.
      (William Grant, #740142)

    - Add missing import to loggerhead.trace, allowing start-loggerhead
      to run when a log.roll config option is set.
      (Max Kanat-Alexander, #673999)

1.18 [10Nov2010]
----------------

    - Syntax highlighting is no longer applied for files greater than 512K,
      reducing codebrowse.launchpad.net overloading.
      (Max Kanat-Alexander, #513044)

    - Documentation added in the docs directory. README simplified
      accordingly. (Tres Seaver).

    - Show svn/git/hg revision ids in loggerhead revision view.
      (Jelmer Vernooij)

    - Fix .bzr/smart access to branches in shared repos. (You also need
      a version of bzr with bug #348308 fixed.) (Andrew Bennetts)

    - Support FastCGI, SCGI and AJP using flup. (Denis Martinez)

    - Repository.get_revision_inventory() was removed in bzr 2.2; use
      Repository.get_inventory() instead. (Matt Nordhoff, #528194)

    - Ignore readonly+ prefix when checking if Loggerhead is serving a
      local location. (Reported by Tres Seaver.) (Matt Nordhoff)

    - Set Cache-Control and Expires headers on static pages.
      (John Arbash Meinel)

    - Generate relative links where possible (everywhere but HTTP
      redirects and feed IDs). (Michael Hudson, Matt Nordhoff)

    - Fix bad redirect when visiting "/download" or "/download/".
      (Matt Nordhoff, #247992)