Accept non-super user when using STDIN
Relax AccessExclusiveLock to ExclusiveLock for bufferedwriter
Merge version 3.1.6
Merge v3.1.6 from release branch
Revert "Relax AccessExclusiveLock to ExclusiveLock for bufferedwriter"

This reverts commit 07384a38f779fdddc0be67693b23c8df80673170.