Add setting to disable fly on spawn instantly or sooner

[ChimpGamer]

Description

Is your feature request related to a problem?

When fly is disabled on spawn you obviously don't want players to fly there at all but the fly timeout setting allows that for # seconds.

Describe the solution you'd like us to implement.

An option to make this timeout shorter or to disable it will prevent players from flying around across spawn for # seconds.

Describe alternatives you've considered.

Additional context