Log error spam without reason 

Hey! I setup logs to be stored end filesystem and then notice hundreds of errors “Lock” are stored, I noticed it comes from this part of codebase. Probably it should be just debug message?

https://github.com/macos-fuse-t/go-smb2/blame/014ce7aff9e19caf96ebe17659da60c3f4b7b8c9/server/file_tree.go#L746