* Closes#5447
* Add option `--okon <okon-cli path>` to trigger the use of the okon cli tool to process a database's entries. When using this option the `-H, --hibp` option must point to a post-processed okon file instead of the standard HIBP text file.
* Updated documentation
This new subcommand checks all passwords in the given database against a given list of SHA-1 password hashes. Such lists are available from the "Have I Been Pwned" project at https://haveibeenpwned.com/Passwords.
Note that this support offline checking only. The HIBP project also provides a web API for checking specific hash ranges; this is not currently supported.