Some lang/perl5 knobs

[Jens Rehsack <rehsack%web.de@localhost>]

Hi Havard, hi Johnny,

as you may noticed, joerg@ committed some minor changes to empower 
lang/perl5 run fine on AIX when compiling with xlc. But joerg@ didn't commit 
all I changed and recommented - e.g. joerg@ decided to include the most 
usual configurations into the RPATH - my change uses a choice via option 
framework.

The other bigger change joerg@ didn't want to commit was the knob which 
allows to enable perl's memory debugging. It's known, that perl will not 
compile safe on some systems when -Dusemymalloc is used - but there are some 
(e.g. AIX *gg*) and maybe - if someone requires it on NetBSD, (s)he fixes 
the problems ...

Joerg told me, I should talk to jlam@ to get the patches applied - and 
rhaen@ told me, you did the update to 5.10.0. So I'm confused and mail you 
both :)

You can review the patch at http://www.hirschbeutel.de/pkgsrc/patch-lang::perl5

Short version without so much "finger pointing": I have some great 
enhancement to lang/perl5 - just apply them :)

Best regards,
Jens