wip/pgp6 6.5.8 NetBSD

PGP (Pretty Good Privacy) is a public key encryption package to protect E-mail and data files. It lets you communicate securely with people you've never met, with no secure channels needed for prior exchange of keys. It's well featured and fast, with sophisticated key management, digital signatures, data compression, and good ergonomic design.

This is PGP 6.5.8, which brings back the classic PGP 2 command line syntax, adds a few more encryption and digest algorithms, and fixes miscellaneous problems in PGP 5.