Maybe the COMMENT in the Makefile can be adjusted with for net-mgmt/riemann so that users who are not aware of "Riemann" can recognize it is a port and cd to it to have more information.

AFAICR, the client does not currently support TLS connexions, maybe this is useful information to add here?

Ruby client library for the Riemann event system. For now, only UDP and TCP transports are supported. TLS transport is currently unsupported.

(with the risk that someone submits a patch for adding TLS support (there is a stale PR for it) and we forgot to update this line.