o Minor bugfixes (memory safety):
    - Avoid freeing an uninitialised pointer when opening a socket fails
      in get_interface_addresses_ioctl.
      Fixes bug 18454; bugfix on 9f06ec0c in tor-0.2.3.11-alpha.
      Reported by "toralf" and "cypherpunks", patch by "teor".
    - Correctly duplicate addresses in get_interface_address6_list.
      Fixes bug 18454; bugfix on 110765f5 in tor-0.2.8.1-alpha.
      Reported by "toralf", patch by "cypherpunks".