[jjo, r=] check_pollen: use -u (unprivileged, won't save cached state), also as there's no data fed into /dev/urandom
* check_pollen:
  - use the new -t|--testing flag, to verify communications with the
    server, runable as a non-privileged user, but not affecting the
    local PRNG
releasing 4.8
opening 4.9