NewHTTPFetchProtocol creates an HTTP fetch protocol to be passed into a Universe constructor; uses a user chosen base path specified in HTTPOptions (or the default "/_galaxycache/" base path if passed nil).

RegisterHTTPHandler sets up an HTTPHandler with a user specified path and serveMux (if non nil) to handle requests to the given Universe.

HTTPFetchProtocol specifies HTTP specific options for HTTP-based peer communication.

HTTPHandler implements the HTTP handler necessary to serve an HTTP request; it contains a pointer to its parent Universe in order to access its galaxies.

HTTPOptions can specify the transport, base path, and stats.Recorder for serving and fetching.