Merge remote-tracking branch 'tor-github/pr/902' into maint-0.2.9

  o Minor bugfixes (TLS protocol, integration tests):

    - When classifying a client's selection of TLS ciphers, if the client

      ciphers are not yet available, do not cache the result. Previously,

      we had cached the unavailability of the cipher list and never looked

      again, which in turn led us to assume that the client only supported

      the ancient V1 link protocol.  This, in turn, was causing Stem

      integration tests to stall in some cases.

      Fixes bug 30021; bugfix on 0.2.4.8-alpha.

    smartlist_free(elts);

  }

 done:

  if (tor_tls)

  if (tor_tls && peer_ciphers)

    return tor_tls->client_cipher_list_type = res;

  return res;