Add SocketMixin for de/optimization per-server.
Additional clarity on optimizations possible
De/optimize at start and shutdown; style tweaks, and added SocketMixin
Deoptimize before close
Change to TODO versus implied TODO
Stylistic tweaks, and reshuffled including location to extend self ( for SocketMixin )
Style tweaks, and reshuffled at inclusion point to extend self
SocketMixin module extends self
.is_a? TCPSocket vs. TCPSocket ===
Finish refactor of Server #120 and retrofit of SocketMixin #114