Txt2Docbook is a Perl script written by Thomas Weber. 

It has not been maintained much lately, so I made some simple modifications and one very useful patch to make it work properly and better. I did submit the patch to the project's code base but never heard back, so this is my modded version (I daren't call it a fork) of a very very useful script. All credit goes to Thomas Weber, really.

-klaatu