p2p: disable encryption handshake, enable log events

Implement command line argument to set the amount miner threads

Cut, Copy, Undo and Redo working in webview

This should prevent connection drops.

The diff is a bit bigger than expected because the protocol handshake
logic has moved out of Peer. This is necessary because the protocol
handshake will have custom framing in the final protocol.

JSON log updates

Defaults to the amount of cores available on the CPU

also fixed an issue where it would force reloads unnecessarily

Cleanup imports

p2p/discover: fix pending replies iteration