Untangle first sentence of changes/bug3607

  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

    - Write several files in text mode, on OSes that distinguish text

      mode from binary mode (namely, Windows).  These files are:

      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.  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