Add SkipReadinessCheck flag

[md5nake]

Certain servers have reasons to set the max player count in SLP responses to zero, or omit the players section. The current sanity checking functionality will throw a "server not ready" error when pinging these servers. Additionally, modern servers (e.g those based on Paper) will wait with replying to SLPs until they are fully initialised, which would make the sanity check redundant.

Hence why I propose adding a --skip-readiness-check flag, which bypasses this check and allows servers based on https://github.com/itzg/docker-minecraft-server to pass healthchecks when they're configured to respond to SLPs this way.

[itzg]

Thanks. I like that it's an opt-in feature since the zero player count check is needed to work around a buggy behavior in older server versions.

[itzg]

Were you planning on also enhancing the call here?

https://github.com/itzg/docker-minecraft-server/blob/222b522bc19638215823798eb8b8e1beea177fa4/bin/mc-health#L16

[itzg]

Included in https://github.com/itzg/mc-monitor/releases/tag/0.14.0