o Minor bugfixes (onion services):
    - In the hs_ident_circuit_t data structure, remove the unused field
      circuit_type and the respective argument in hs_ident_circuit_new().
      This field is set by clients (for introduction) and services (for
      introduction and rendezvous) but is never used afterwards. Fixes
      bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.