Log Message:
Update to 1.68.1:

This release adds localization support for Farsi (thanks to Sina Heshmati) and
improved support for the XLink-based DocBook NG db:link element. Other than
that, it is a minor bug-fix update to the 1.68.0 release. The main thing it
fixes is a build error that caused the XSLT Java extensions to be jarred up
with the wrong package structure. Thanks to Jens Stavnstrup for quickly
reporting the problem, and to Mauritz Jeanson for investigating and finding the
cause.

Also use .tar.bz2 distfile.