tor-parallel-relay-conn/changes/trove-2017-005

  o Major bugfixes (hidden service, relay, security):
    - Fix an assertion failure caused by receiving a BEGIN_DIR cell on
      a hidden service rendezvous circuit. Fixes bug 22494, tracked as
      TROVE-2017-005 and CVE-2017-0376; bugfix on 0.2.2.1-alpha. Found
      by armadev.