Debug modes

[V1nc3ntWasTaken]

Add an option and function for debug modes which can help end users report issues, and contributors diagnose and fix these issues.

There can be modes such as:

• STRICT which hold back sensitive information like pre-handled signatures, player keys, usernames, etc. and just display their length in debug logs.

• NEED_TO_KNOW which will still hold back sensitive information, but will log the first few characters in a signature or player key. (to ensure they are valid values)

• FULL which logs all information.

(Other values can be introduced later on)