* Implement upgrade mechanism for p2p
* Remove dependencies from flowcontext to v3
* Add p2p v4
* Add Ready flow
* Remove copy paste code of v3
* Register SendAddresses flow at the top level
* Add option to set protocol version from CLI and add TestAddressExchangeV3V4
* Send ready message on minimal net adapter
* Rename defaultMaxProtocolVersion->maxAcceptableProtocolVersion
