Requirements

This should prevent issues with unactive devs
Mainly, the usage license for the minecraft server software is different than the license for the client...eg, there's no authentication built in to *running* a server like there is for running the client.

I'm not sure that we need to have this in our license. The Mojang ToS has sections laying this out...if you're running Minecraft, you need to comply with Mojang's license, which may change (eg, if they add a time-limited demo mode).

Possibly we should had bit (not necessarily in this exact spot) about how this license requires compliance with the Mojang license at that point in time (eg so that a change to Mojang's license tomorrow won't effect the code I wrote today).