Support hard_remove in fuse exfat

[lunesky]

If we unlink file which is still being opened, fuse will rename it to a hidden file and deletes it after its closed, which might confuse user. Can fuse exfat support hard_remove as a mount option, which simply deletes without renaming to hidden file?

[relan]

Sounds like a good idea. fuse-exfat code should be ready for this, but some work will be needed probably.