ports/69421: perl5-related distfiles are in common distfiles directory

[Lars Thegler]

Sergey Skvortsov wrote:
> At least we can accept policy to put DIST_SUBDIR= perl for all new 
> versions of perl ports.

Perl module ports, yes. But it's probably not a good idea for the main 
lang/perl5{,.8} ports, because that will force all users to re-fetch all 
the perl module distfiles, when they do the lang/perl5{,.8} update.

/Lars