hsync: dry-run option

[Former user]

I think a "dry run" option (like in rsync) would be useful, please consider adding it. Thanks for sharing this useful tool!

[Pierre Neidhardt]

There may be a misunderstanding because hsync does a dry-run by default. It only renames the files if the -p option is used.

Note that the project is hosted at https://github.com/ambrevar/hsync :)