To prepare the router's for the eventual removal of the router_options
parameter, the API option arguments should not be used. The parameters can
be substituted by tokenizing the value of the parameter that is still
stored as a part of the service.
This clarifies what parts of the router are specific to the binlogrouter
and what are common between the binlogrouter and avrorouter.
Ideally, the two modules would use the same infrastructure to handle the
processing of replication events. This is the first, albeit small, step
towards making the code in the binlogrouter the common infrastructure.
