text: Plugin for Rewriting External Link URLs
  Description
  Rewrite external link location, to hide referers for private sites, to use social bookmark sites, and so on.; e.g. project sites in local networks. (this plugin contains simple redirectors).
  Or, using bookmark site; del.icio.us:
  <a class="ext-link" href="">outgoing site</a>
  Bugs/Feature Requests
  Existing bugs and feature requests for ExtLinkRewriterPlugin are here.
  If you have any issues, create a new ticket.
  Download
  Download the zipped source from here.
  Source
  You can check out ExtLinkRewriterPlugin from here using Subversion, or browse the source with Trac.
  Install
  make the egg package
  python setup.py bdist_egg
  copy egg into your trac plugins dir.
  cp dist/ExtLinkRewriter*.egg /where/to/trac/plugins/
  To activate the plugin, edit conf/trac.ini:
  [components] ExtLinkRewriter.* = enabled
  Example
  Redirect = namespaces = http,https
  hatena bookmark
  [extlinkrewriter] format = namespaces = http,https
  Mix redirector and bookmark
  [extlinkrewriter] format = /redirector.html?:
  add site info in README.txt
  Author/Contributors
  Author: bellbind
  Contributors: