Since Qt does not yet transparently resend HTTP2 requests in some cases
we do it manually.
The test showed a problem where the initial non-200 reply would close
the target temporary file and the follow-up request couldn't store any
data. Removing that close() call is safe because there also is a
_saveBodyToFile flag that guards writes to the target file.
From issue #7015, the code is wrong because the path is the file system path and
not the path on the DB.
But since this is a conflict, this means the reconcile will still want to download
the file from the server next sync, so we need not to worry about this case
It could happen that readyRead was emitted for incoming data while the
download was not yet finished. Then the network job could finish with
no more data arriving - so readyRead wasn't emitted again.
To fix this, the finished signal also gets connected to the readyRead
slot.
