int mtype; // the message type for this list
int nrrgroups; // number of rr groups to send to
rrgroup_t** rrgroups; // one or more set of endpoints to round robin messages to
int mtype; // the message type for this list
int nrrgroups; // number of rr groups to send to
rrgroup_t** rrgroups; // one or more set of endpoints to round robin messages to