o Remove configuration option (confic):
    - AllowInvalidNodes was deprecated in 0.2.9.2-alpha and now has been
      rendered obsolete. Code has been removed and feature no longer exists.
    - AllowSingleHopCircuits was deprecated in 0.2.9.2-alpha and now has been
      rendered obsolete. Code has been removed and feature no longer exists.
    - AllowSingleHopExits was deprecated in 0.2.9.2-alpha and now has been
      rendered obsolete. Code has been removed and feature no longer exists.
    - ExcludeSingleHopRelays was deprecated in 0.2.9.2-alpha and now has been
      rendered obsolete. Code has been removed and feature no longer exists.
    - FastFirstHopPK was deprecated in 0.2.9.2-alpha and now has been rendered
      obsolete. Code has been removed and feature no longer exists.
    - CloseHSClientCircuitsImmediatelyOnTimeout was deprecated in
      0.2.9.2-alpha and now has been rendered obsolete. Code has been removed
      and feature no longer exists.
    - CloseHSServiceRendCircuitsImmediatelyOnTimeout was deprecated in
      0.2.9.2-alpha and now has been rendered obsolete. Code has been removed
      and feature no longer exists.
    - WarnUnsafeSocks was deprecated in 0.2.9.2-alpha and now has been
      rendered obsolete. Code has been removed and feature no longer exists.