Add a "farming" example.

[goodboy]

Pertains to #175 but came to mind after a question in trio gitter and mostly for the lulz since, names.

hypercorn has a trio entry point and thus can be spawned from within an ActorNursery. Presuming one configs diff ports for the servers we can run multi-core hypercorns pretty easy peasy.

lurkerz unite.

[goodboy]

We need to make a combine pun in this obvs 😂