rfs4x_findsession_by_id
sp = rfs4x_findsession_by_id(args->bctsa_sessid);
sp = rfs4x_findsession_by_id(args->dsa_sessionid);
if ((sp = rfs4x_findsession_by_id(sargs->sa_sessionid)) == NULL)
rfs4_session_t *rfs4x_findsession_by_id(sessionid4);