Option to disable the horde warnings

[LakeYS]

Servers can configure a variable blood moon through the "BloodMoonRange" setting which conflicts with the bot's horde timer. That one's not so easy to predict (unless we can spy it from the console somehow).

<property name="BloodMoonRange" value="0" />
<!-- How many days can the actual blood moon day randomly deviate from the above setting. Setting this to 0 makes blood moons happen exactly each Nth day as specified in BloodMoonFrequency -->