fix typo and possible confusion in changelog entry

  o Major bugfixes (client, security, also in 0.2.8.7):

    - Only use the ReachableAddresses option to restrict the first hop

      in a path. Previously, it would apply to every hop in the path,

      with a possible degredation in anonymity for anyone using an

      uncommon ReachableAddress setting. Fixes bug 19973; bugfix

      on 0.2.8.2-alpha.

      in a path. In earlier versions of 0.2.8.x, it would apply to

      every hop in the path, with a possible degradation in anonymity

      for anyone using an uncommon ReachableAddress setting. Fixes bug

      19973; bugfix on 0.2.8.2-alpha.

  o Major features (user interface):

    - Tor now supports the ability to declare options deprecated, so