Clearnet p2p

[sachaaaaa]

• generate certs and stuff for SSL, after storage is ready
• spin an HTTPS server for p2p instead of HTTP
• use nat-upnp to punch hole. We try to read the existing mappings first, if that fails, we assume uPnP not enabled and we stop the server. If that works, we get the existing public ports in use. Then we try to punch from port 22100 to 22200, skipping the ports we know are already in use by other processes. After this, we can query nat-upnp for the public ip that we need to broadcast.
• Allowed half p2p (one client with p2p, the other not) by adding a type REACHABLE/UNREACHABLE sent in the broadcast message. UNREACHABLE means that the client can't spin its HTTPS server but still needs to send that message to trigger the code path that allows half p2p.

Coming next: signing with signal pubkey of SSL cert + verification

[BeaudanBrown]

Looks good, just a few little bits

[Mikunj]

Suggested change

	Whisper.events.on('registration_done', async () => {
	Whisper.events.on('registration_done', () => {

Un-needed async

[BeaudanBrown]

Will do in separate PR