Document erlang busy-wait options, recommend hosters
It came up again that the BEAM will do busy-waiting to preserve some real time behavior, see https://stressgrid.com/blog/beam_cpu_usage/.
This can be somewhat bad for people hosting on VPS systems that have 'burst' modes, that is, scaling based on CPU load. We should document the options to disable this behavior and maybe give some hosting suggestions, either specific companies or general advice, e.g., don't use AWS.