Merge branch 'rs/zip-with-uncompressed-size-in-the-header'

Merge branch 'rs/zip-with-uncompressed-size-in-the-header'

Improve compatibility of our zip output to fill uncompressed size
in the header, which we can do without seeking back (even though it
should not be necessary).

* rs/zip-with-uncompressed-size-in-the-header:
  archive-zip: write uncompressed size into header even with streaming