Wishlist: support .rclonelink style links

[callegar]

Apparently rclone that is a popular software for syncing data to the cloud supporting multiple providers uses a technique similar to nlinkfs in order to deal with symbolic links with providers that do not support them.

Specifically, rclone stores its symlinks in files with no signature using the extension .rclonelink. This is different from nlinkfs that stores symlinks in files with a signature and the .LNK extension.

For interoperability, it would be nice if nlinkfs could provide an option to deal with links in the rclone style.

A typical usage case would be to move from rclone to another synchronization software not supporting symlinks at all using nlinkfs as an adaptation layer or viceversa.