o Minor bugfixes (circuit padding):
    - Add a torrc option to disable circuit padding. Fixes bug 28693; bugfix
      on 0.4.0.1-alpha.
  o Minor bugfixes (circuit padding):
    - Provide consensus parameter to fully disable circuit padding, to be used
      in emergency network overload situations. Fixes bug 30173; bugfix on
      0.4.0.1-alpha.
  o Minor bugfixes (circuit padding):
    - Allow circuit padding machines to specify that they do not contribute
      much overhead, and provide consensus flags and torrc options to force
      clients to only use low overhead machines. Fixes bug 29203; bugfix on
      0.4.0.1-alpha.