Offline mode

[fazo96]

If there is a localhost rendezvous server, the lib should avoid trying to connect to the internet. This is to make sure that Demos can work with conference wifi or no connection at all.

Possible implementation:

• service node can listen for WS and TCP connections (Next ChluIPFS Iteration #79 listen mode)
• node.js nodes (in particular the marketplace) connects to localhost using TCP (Next ChluIPFS Iteration #79 Chlu bootstrap list)
• browser connects to localhost using WS (Next ChluIPFS Iteration #79 Chlu bootstrap list)

Unfortunately this doesn't work because to connect you need the IPFS peerID

Next idea:

--offline flag that tells service node to run rendezvous server on well-known non-default port. Other nodes will use HTTP to (quickly) check localhost at that port to see if the rendezvous is running. If it is, they use it instead of other rendezvous servers. This will allow every Chlu app to connect to the localhost service node and to have a complete Chlu network running locally without an internet connection!