[Bug 55029] Wishlist: do reflink on CopyFileW for WINEPREFIX size reduction

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55029

--- Comment #5 from Alex Xu  ---
Created attachment 74974
  --> https://bugs.winehq.org/attachment.cgi?id=74974
rebased IOCTL_COPYCHUNK patches

I stopped submitting the patches due to apparent lack of interest in wine
project. I have done a basic rebase which compiles successfully but haven't
tested further. If wine project is interested in accepting them now, I can go
through it more carefully.