saljam
allow clients to select slot
The original implementation allowed the client to select an arbitrary slot. The signalling server still supports that.
That worked by optimistically assuming we're side A, sending the PAKE A message and if the slot is already taken throw that away and start again as B.
The uncertainty about which side a client is made me nervous and I never needed to pick my slot anyway, so I disabled this. I'm leaving this issue open to remind myself that if needed this can be brought back.
Some more thoughts on this: we could allow clients to choose their own slots if they're over a certain length. Say 16 bytes, the length of a GUID.
If we then allow more than 2 peers on these long slots (by broadcasting each message to everyone else) this might facilitate using WebWormhole to establish generic multi-party webrtc connections.