- Removed -c --clean mode. It's not too useful and adds a considerable
amount of gratuitous code. It takes almost the same time than
adding all pkgs from scratch.
- When creating the repository data always add the meta plist at the
2nd position in the archive, to optimize its access.
- Misc improvements.
The list of required external deps is now confuse, libarchive and openssl.
libxbps now includes a wrapper for proplib prefixed with xbps_ rather than prop_.
