Currently, we install modules which are not versionned at all in a versionned way:
site_perl : lib/perl5/site_perl/5.18 site_perl_arch : lib/perl5/site_perl/5.18/mach
This changes the layout to:
site_perl : lib/perl5/site_perl site_perl_arch : lib/perl5/site_perl/mach/5.18
Allows to have all modules without any .so installed at the same place
whatever the Perl version is, and allows to have versionned versions of the
modules with .so.
Introduce a new plist replacement, SITE_ARCH, containing SITE_PERL/PERL_ARCH/PERL_VER
Remove perllocal.pod from Mk/Uses/perl5.mk, and cleanup ports installing/removing it.