Made the pirate and FLF planets into "black markets".

NOTE: This depends on #140. It will not work without it. #140 adds support for the "blackmarket" flag used here.

It doesn't make sense for pirate and FLF bases to require licenses to buy stuff from them. It only really has an effect on pirate bases (the FLF base with #136 only sells a no-license variant of some ships and mace rockets).