Upgrade to 3.00

This is a major rewrite that combines the codebases of the former
hashcat (running on the main CPU) and oclHashcat (running on the GPU).

Because of the extent of the changes, the previous version will still
remain available, renamed to 'hashcat-legacy' (following upstream)

ChangeLog: https://github.com/hashcat/hashcat/releases/tag/v3.00

PR: 210873
Submitted by: lifanov@mail.lifanov.com (maintainer)