Merge branch 'en/merge-recursive-2'

Merge branch 'en/merge-recursive-2'

* en/merge-recursive-2: (57 commits)
  merge-recursive: Don't re-sort a list whose order we depend upon
  merge-recursive: Fix virtual merge base for rename/rename(1to2)/add-dest
  t6036: criss-cross + rename/rename(1to2)/add-dest + simple modify
  merge-recursive: Avoid unnecessary file rewrites
  t6022: Additional tests checking for unnecessary updates of files
  merge-recursive: Fix spurious 'refusing to lose untracked file...' messages
  t6022: Add testcase for spurious "refusing to lose untracked" messages
  t3030: fix accidental success in symlink rename
  merge-recursive: Fix working copy handling for rename/rename/add/add
  merge-recursive: add handling for rename/rename/add-dest/add-dest
  merge-recursive: Have conflict_rename_delete reuse modify/delete code
  merge-recursive: Make modify/delete handling code reusable
  merge-recursive: Consider modifications in rename/rename(2to1) conflicts
  merge-recursive: Create function for merging with branchname:file markers
  merge-recursive: Record more data needed for merging with dual renames
  merge-recursive: Defer rename/rename(2to1) handling until process_entry
  merge-recursive: Small cleanups for conflict_rename_rename_1to2
  merge-recursive: Fix rename/rename(1to2) resolution for virtual merge base
  merge-recursive: Introduce a merge_file convenience function
  merge-recursive: Fix modify/delete resolution in the recursive case
  ...