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File cloning improvements - #5168

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tuffnatty wants to merge 7 commits into

MidnightCommander:masterfrom

tuffnatty:linux-copy-file-range

Commits on Oct 4, 2026
- (fix) copy_file_file: don't preallocate space in append and reget modes
  
  zyv
  authored and
  tuffnatty
  committed
  b9dbfd8
- (fix) file cloning: Require COPY_FILE_RANGE_CLONE support on FreeBSD (15.0+)
  tuffnatty
  committed
  7303d00
- Add support for cross-filesystem file cloning on Linux 5.19+
  
  tuffnatty
  and
  zyv
  committed
  9365e47
- ux: Report progress during slow file cloning, e.g. NFS < 4.2
  
  tuffnatty
  and
  zyv
  committed
  6e793fe
- tests: add regression tests for mc_copy_file_range_*()
  tuffnatty
  committed
  43c00c5
- tests: add copy_file_file() regression tests
  
  zyv
  authored and
  tuffnatty
  committed
  20e17aa
- Enabled file cloning for temporary files created during VFS copy
  tuffnatty
  committed
  cacf21c