perl: Improve perldoc behavior

[dmik]

As of perl RPM 5.16.1-4 (to be released overnight), perldoc finally works. There are a few glitches however:

• We lack an OS/2 port of groff so the default formatter doesn't work, you have to use the -t option to force a simple text formatter. This option is the default on Win32, we should either make the same for O/S/2 or port groff.
• Perldoc output only uses LF as line separator so lines are shifted on the screen and you need some Unix pager like less explicitly to fix that. A better fix is needed. BTW it seems that there is a common problem as if you e..g will try git add -i (interactive git add interface written in Perl) and ask for a diff you will get the same problem.

[Silvan Scherrer]

as groff is done, this could be enabled

[Silvan Scherrer]

I'm pretty sure this works now. If not please open a ticket at our github perl repo.