Object for handling Usenet articles in mail or news form

This module originated with the development of the software intended
to handle newsgroup creation for the (new) mod.* Usenet hierarchy.
The requirement to centralise, and fully automate, the process of
group creation and the detection of defunct groups led to a large
number of cases where the software would be required to read, parse,
forward, reply to, mail and post articles of various forms.