Log message:
since perl is now built with threads on most platforms, the perl archlib
module directory has changed (eg. "darwin-2level" vs.
"darwin-thread-multi-2level").

binary packages of perl modules need to be distinguishable between
being built against threaded perl and unthreaded perl, so bump the
PKGREVISION of all perl module packages and introduce
BUILDLINK_RECOMMENDED for perl as perl>=5.8.5nb5 so the correct
dependencies are registered and the binary packages are distinct.

addresses PR pkg/28619 from H. Todd Fujinaka.

Log message:
Import p5-Class-Fields from pkgsrc-wip.  Packaged by Hiramatsu
Yoshifumi and slightly modified by me.

Set of perl modules for object oriented development.

* Class::Fields - inspect the fields of a class
* Class::Fields::Fuxor - low level manipuation of object data members
* private - add private data members to Perl classes
* protected - "private" data fields which are inherited by child classes
* public - add public data members to Perl classes