Redirect old URLs

[szabgab]

Historically many people have been linking to version specific files on search.cpan.org.
When that version of the module is removed from CPAN, these links become broken.

Instead of showing an 'Not found' error sco. could redirect those URLs to the stable URL.

This is only relevant if this code is used to run sco.

For example

http://sco.perlmaven.com/~szabgab/CPAN-Test-Dummy-SCO-Pirated-1.03/lib/CPAN/Test/Dummy/SCO/Pirated.pm is going to be deleted soon. It should redirect to
http://sco.perlmaven.com/dist/CPAN-Test-Dummy-SCO-Pirated/lib/CPAN/Test/Dummy/SCO/Pirated.pm

In order to avoid the need to keep track of all the old releases we might want to redirect even urls such as
http://sco.perlmaven.com/~szabgab/CPAN-Test-Dummy-SCO-Pirated-1.02/lib/CPAN/Test/Dummy/SCO/Pirated.pm
that were never on CPAN.

[szabgab]

implemented