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.
X11::Protocol and the related modules in this distribution are a rough
equivalent of Xlib (libX11.a, with a bit of Xau and Xext mixed in)
used for drawing windows on and otherwise manipulating X11 window
servers.
