Add jpackage_script manpage

[mizdebsk]

No description provided.

[mkoncek]

While it is obvious what is meant. I was wondering if there is another way to distinguish script_name, perhaps by adding italics.

[mizdebsk]

The mandoc format uses semantic formatting, annotating meaning and not formatting.
Instead of bold, italics, underline etc. mandoc distinguish between command arguments, environment variables, paths etc.
Eg. Ev PATH Ev means it is env variable, Pa is path, Ar argument etc.
In this particular case we have %{buildroot}%{_bindir}/ with Pa (path) and script_name with Ar (argument), which to me looks correct - script_name is not literal, but argument of the macro.

[mkoncek]

I like the manpage. All the important points are present.