Issue 1409. A list of a place the mesh keeps a secret, or of a machine's credential places, at any depth, answers each entry's name, type, owner, group, mode, size and a link's target held to the content rule, never content, and says secret-place; a process's environ, mem, fd, map_files, root and cwd stay refused. Lines touched cite ADR 0394 §7. Builds: design 39 parts D3 (§15), bullets 2 and 5