Allow the handshake and channel request to proceed correcty even with
already established channel to handle the case where peer attempts to
reconnect after restart.

Changelog: Handle peer reconnection after its restart

Changelog: Implemented streams in network protocol

git-subtree-dir: test
git-subtree-mainline: 5772558e784b89abbd42dde6f945bbe6fc09d296
git-subtree-split: bbefd6f0cbf4867af2e2e41e0719bf010bd16f2c