o Minor bugfixes:

    - Write several files (currently, buffer-stats, dirreq-stats, and
      entry-stats on relays that collect those statistics, client_keys
      and hostname files for hidden services that use authentication,
      and (in the tor-gencert utility) newly generated identity and
      signing keys) in text mode, on OSes that distinguish text mode
      from binary mode (i.e. on Windows).  Previously, we wouldn't
      specify text mode or binary mode, leading to an assertion
      failure.  Fixes bug 3607.  Bugfix on 0.2.1.1-alpha (when the
      DirRecordUsageByCountry option which would have triggered the
      assertion failure was added), although this assertion failure
      would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.