4 :revdate: {sys:date "+%Y-%m-%d %H:%M:%S"}
10 overlay-clean-root - Clean UPPER relative LOWER by removing equal files.
14 *overlay-clean-root* _conf_
19 *overlay-clean-root* reduces the UPPER directory tree for an off-line
20 subhost by removing all files that equal to the files they shadow in
21 the LOWER directory tree.