Read vs Write routing

[rrobetti]

Create the capability of OJP server to route reads and writes to different servers. The main use case is to send all writes to the primary instance.

[rrobetti]

I have got Copilot to start an analysis on Read Write splitting and here is the current conversation status: https://github.com/Open-J-Proxy/ojp/pull/342/changes

[rrobetti]

This has been implemented.