bin/man is practically hopeless

[briandfoy]

I tried to remove the DB_File prerequisite, but in doing so I noticed that this program in heavily tied to unix utilities not present in PerlPowerTools and depends on various settings unlikely to exist in most modern situations. It certainly doesn't have a hope of working on non-Unix systems where there is no man database.

I've removed bin/man from MANIFEST.

Part of this removal was motivated by

• Ubuntu does not include the DB_File module (or many other things in the Perl Standard Library)
• DB_File is for Berkeley DB v1, which is ancient and unavailable
• The Perl 4 code could use some modernization and refactoring