find_service
fnd = find_service(regp->r_prog, regp->r_vers, regp->r_netid);
fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid);
rbl = find_service(arg.prog, arg.vers, transp->xp_netid);
static rpcblist_ptr find_service(ulong_t, ulong_t, char *);