Find better way of dealing with host-specific files

[fwcd]

Perhaps using a directory structure like [package]/host/[hostname]/[file] instead of [package]/[file].[hostname] would be better since it's more generic, not as reliant on custom file-naming schemes, better to discover automatically (e.g. this schema wouldn't require declaring every host-specific file in the dotpkg.json), better supported in editors and on OSs like Windows that rely on file extensions?