CheckOwnDirs is about that ackage must own all directories that it creates and require directoreis it uses.
If all deps are downloaded as described in #166, this could be automated (list all dirs in package, check that they are either created and owned by package or in a dependency).
This of course also covers CheckOwnOther (Packages must not own files or directories already owned by other packages) and CheckDirectoryRequire (Package should require directories it uses).
Fixed in b835925acc2a0