Lennart Poettering
7c6c0851f1
A path that ends in a slash must refer to a directory, but so must one whose last component is "." or "..". We have path_implies_directory() covering all these cases, hence use it where we so far just checked for a trailing slash, to determine whether a path can only refer to a directory. This affects valid_shell() and valid_device_node_path() (no change in behavior there, since the paths are refused anyway if not normalized), and the check in the boot loader spec parser that refuses paths to directories (where "/foo/." so far slipped through).
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