- dir_update, ... repository types
- magic number in archives
- repo index
- different database with less overhead (if possible and required)
- parallel compression (and decompression?)
- lock database
- pkg signatures
'Wishlist' ---
- maybe reset env after fork to execute maintainer scripts
- show files of an installed package (and read files of uninstalled packages from repo)
- search package by file
- search package by name with wildcards
- being able to move all files from one package to another (depres)