CPAN-1.44_52 - query, download and build perl modules from CPAN sites

Changes for version 1.44_52

prereqs u to the caller and doesn't contact the queue directly. That way the caller can decide to queue them all and requeue himself what he does. jump_queue now accepts an array of items. Code seems compacter and easier to debug.
Checking $^O for C</win/i> and not for C<eq "Win32"> because apparently some say Win32, others say MSWin32. Needs to be bugreported to p5p.
=head2 December 1998 after 1.43
Greg Ward <gward@ase.com> sent me a patch to make read_mirrored_by() user-friendly. Selection of sites is now done in three layers for continents, countries and sites separately.
Bharat Mediratta <bmedirat@calicotech.com> sent in a patch that inserts a '<' file redirector in CPAN::Tarzip::untar which helped him to work with a strangely broken gzip program on his Windows machine. Later Eric Von Zee <evonzee@tritechnet.com> sent me a note that there is a version of tar for Windows that doesn't work with pipes at all. Changed that again, so that on windows we uncompress the file and then untar it in another system() call.
Made a few formatting changes to help cperl-mode.
=head2 December 1998 after 1.42