The DDoS attacks can cause people who otherwise generally don't have connection issues to register matchmaker violations. We should add some config options to enable/disable violations entirely, and while we're at it we could add a config option to set the threshold for how many violations are needed to start triggering a matchmaker timeout, and how long it takes for violations to expire.

Proposed config options:

• MATCHMAKER_VIOLATIONS_ENABLED default true
• MATCHMAKER_VIOLATIONS_BAN_THRESHOLD default 2
  How many violations it takes before a ban (matchmaker timeout) is triggered
• MATCHMAKER_VIOLATIONS_FIRST_BAN_DURATION default 600
  The first ban is shorter than the rest
• MATCHMAKER_VIOLATIONS_BAN_DURATION default 1800
  How long each ban lasts
• MATCHMAKER_VIOLATIONS_RESET_TIME default 3600
  How much time needs to go by since the last violation for the violation tracking to reset