Orchestrator: fix version management

[rhymu8354]

Occasionally in production an individual server will crash, and the cause is unknown. It doesn't cause any big issues because the other servers will keep running and take over the cluster. Unfortunately, the version the crashed server was running will have been marked "bad", and the Orchestrator will not run this version anymore.

The reason for marking a version "bad" was to avoid the situation where a server had some critical flaw and would repeatedly crash, causing the game to halt. So far, this hasn't happened.

There is not currently any way to clear the "bad" version flag other than to edit the versions.json file on the host.

[rhymu8354]

Design changes:

• Only mark a version "bad" if it crashes a certain number of times within a certain time window (both configurable).
• Make "bad" flag visible to the GM, and allow them to be toggled by the GM.

[rhymu8354]

I made the "bad" flag visible to the GM, and now allow the GM to toggle it.

[rhymu8354]

I added a crash counter and configurable time window with crash threshold.