This extension adds Kerberos support for authentication. The users still need to be created
in the Retrospectiva user management store and should have a default password assigned. This
allows non-Kerberos supported users (e.g. admin) to login to Retrospectiva using their
standard assigned password in the application. Also, if for any reason that the Kerberos
authentication fails, such as the KDC being unavailable, the authentication will default
over to the Retrospectiva managed passwords.

In order to use this extension, the server running Retrospectiva must be Kerberized.  The
underlying authentication uses the 'kerberos' gem (http://rubyforge.org/projects/krb5).
When trying to install this gem on FC6 (or probably most current Linux distros) there is
a problem with the krb5 header file that can cause compilation to fail.  I have submitted
a patch that should correct the problem and hopefully it will be applied soon.  In the
meantime, you can patch and install the gem by following the steps below:

  cd /tmp
  svn checkout svn://rubyforge.org/var/svn/krb5
  cd krb5
  wget http://rubyforge.org/tracker/download.php/2242/8744/9436/1603/kerberos.patch
  patch -p0 < kerberos.patch
  gem build kerberos.gemspec
  sudo gem install -l kerberos-0.3.gem