GitHub Realtime needs to be able to authenticate. This PR adds relevant fields to the relevant protobuf message, and exports/tweaks some stuff from the github source package to permit its (eventual) use by the GitHub Realtime implementation:
The Connector interface and its constructors are now exported
Connector.Clone now accepts additional clone arguments
The github-specific connection construction has been moved into github.go
The injected rate limit handler no longer accepts error reporters that it never uses
I also added an API endpoint field to the GitHub Realtime proto message, because we need that too and I was here.
Cody Rose
ae793d7030