[PATCH v2 0/5] MR10223: Wininet refactors

[Reyka Matthies (＠tmatthies)]

This is the second set of patches towards the mfplat network bytestream, after !9369. Mostly preparatory work and refactors.

--
  v2: wininet: Factor request creation out of HTTP_HttpSendRequestW.
      wininet: Do not reset content_pos in reset_data_stream.
      wininet: Factor out writing of cache file.
      wininet: Wrap INTERNET_SendCallback in local wrapper.
      include: Add MFNETSOURCE_STATISTICS_SERVICE definition.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10223