TODO

- Add sizes output for linkedPairs (at least for JSON)
- Maybe add bytes saved per linkpair output (verbosity > 2)
- Output data to determine if samename saves space, or just shuffles paths
- Use viper config files
- enable IgnoreWalkErr when !LinkingEnabled (?)
- include/exclude using shell globs
- Progress for linking phase
- Windows support
 - Stat_t info (nlink, ino, dev) from ByHandleFileInformation (see
   stat_windows.go and types_windows.go)
 - Use SameFile(), Size() for compatibility.
- Ensure protection against symlink races
 - Probably only src links that could be affected (by making hardlink of symlink)?
 - Use linkat() for initial hardlink creation?
- Make progress a goroutine? (so that main goroutine doesn't need to call Show())
 - Makes use of Results data racy, so may require additional Mutexing (and WaitGroup)

Done:
- Reuse prev src path if new src path has the same ino
- Humanize size input
- Allow files on CLI (along with dirs)
- Report nodes with paths outside walked trees
- Report bytes compared
- Sort by ino number (tie breaker for nlink)
- Count files and dirs from walked paths (ie. eliminate duplicates from count)
- Progress with separate func ("RunWithProgress"?)
- Rename StatInfo to Info (done and undone)
- Run() returns errors
- File content comparison error handling
- Check min/max file sizes are ordered correctly
- AllPaths as closure (iterating directly over dict copy) instead of goroutine
 - Not possible(?) due to map iteration not being possible to capture in a closure
 - Do AllPaths without cloning FilepathsMap instead?
 - Removed copy, but must use sync.Map or locking due to iteration/update in separate goroutines
 - Iterate over slice of patnames, rather than PathsMap or it's copy
- Using "LinkableInos" or "MatchedInos" naming rather than "LinkedInos", to not
  imply that these Inos are not already hardlinked together.
- Audit goroutines used as generators for race conditions (due to common receiver struct access)
  - Return closures instead of computed values?
- Randomize powersetPerms for directory/file test walk ordering
- Keep track of what has actually been linked during run
- SameName testing (randomized, and w/ existing links)
- Test linking of "clusters" (ie. groups of equal already-linked files)
- "ExistingLinkCount" instead of "PrevLinkCount"?
- Report in text output if Results are incomplete
- Output ignored patterns in results (debug?)
- Use less memory (during text output, shorten in-memory slices?)
- Skip (option) when read permissions errors (and count permissions errors)
- log (more/less)?  Failed stat log, or count? Log skipped dirs/files when ignoring
- Indicate cmpBytes are divided by 2 (/2); report actual compared bytes
- Allow whether to update time/owner to dst (when newer)
- Adaptive file comparison buffer size
- Preallocate cmp and digest bufs
- Test to verify correctness of short reads (use different buf initialization)
- Export "humanize" funcs (?)
- Message when linking is enabled
- Check for repeated dirs by dev/inode comparison
- Verify proper reporting of mismatch results
- Explain results in README (in particular, oddness of results when not all inode paths are found, etc)
- Make Ino Hashes with Mode and Owner information (not just time and size)
- Show more humanized decimals when progress sizes get large (?)
 - Basically to improve 'liveliness' of the updates, and show values changing
- go mod
 - Add full github.com/chadnetzer/hardlinkable import path naming to source files
- Double check mode bits after Lstat() - Ensure it's a 'regular' file
 - Some filesystems don't return full type info for readdir, and godirwalk may misreport it (fixed)