Meta server: simplify / optimize rename in worm mode by clearing overwrite flag, and changing return status to EPERM to maintain backward compatibility in the case if destination exists.
Meta server: simplify / optimize rename in worm mode by clearing overwrite flag, and changing return status to EPERM to maintain backward compatibility in the case if destination exists.

quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs