[pygettext] --package-name and --package-version unknown

[c.buhtz at posteo.jp]

Hello,

am I right to assume that "pygettext" is part of the official Python3 
"package"? So it is OK to aks here?

I do use pygettext to handle po and pot files. In the manpage I'm not 
able to find help about this.
I would like to modify the header that pygettext does create in each 
po-file.

How can I set the "Project-Id-Version"? With "xgettext" I would use the 
arguments "--package-name" and "--package-version" for this but they are 
unknown for "pygettext".

Kind
Christian