Restart servers periodically

[jojomatik]

Is your feature request related to a problem? Please describe.
The memory usage of my servers tends to increase over time. Once in a while, that leads to crashes of a server when not enough memory is available.

Describe the solution you'd like
A GUI that allows users to schedule periodic restarts.

Ideally, a dropdown that contains the most important intervals (daily, weekly) as well as the possibility to use the cron syntax.

It would be great if it would be possible to delay the restart until all players have left the server to not disturb gameplay.