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.
slightly modified by me.
This class provides a mechanism to mirror a stream to multiple other
streams. It can either multiplex an output stream to multiple output
streams, or it can multiplex an input stream to multiple output streams
(mirroring all the data read onto the output streams).
