Using gun's new envelope system (where routing and de-duplication happen
inside gun core), server-to-server synchronization has been
implemented.
However, it comes with this warning: the chain isn't yet ready and
you'll have difficulty reading or writing data via the chain.
Changes behavior from only opening sockets when absolutely necessary to
keeping them open for as long as possible. Key differences:
- Much higher success rate for messages sent from the connected server.
- Process no longer shuts down if nothing is done with gun, instead
listens for incoming messages on client sockets.
Socket reconnect handle by Peer instances, meaning better handling for
deferred messages and predictable backoff.
The client.js logic has been significantly refactored. Among the
improvements, GET/PUT requests now respect the `peers` option for each
gun instance, only sending requests to the URLs listed.
