HandshakeConfig is a common handshake that is shared by plugin and host.

This is the implementation of plugin.Plugin so we can serve/consume this This has two methods: Server must return an RPC server for this plugin type.

Here is an implementation that talks over RPC.

Here is the RPC server that SayerRPC talks to, conforming to the requirements of net/rpc.

Sayer says what an animal says.