Merge from vendor branch TNF:

Merge from vendor branch TNF:
New package: odt2txt

odt2txt is a small, command-line tool which extracts the text out
of OpenDocument Texts, as produced by OpenOffice.org, KOffice,
StarOffice, and others.  It supports multiple output encodings, has
locale support, and is able to substitute unknown characters.

(After I packaged this I also found o3read already packaged.)