find_service
static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *);
fnd = find_service(reg.r_prog, reg.r_vers, reg.r_netid);
fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid);
rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid);