- if the user wants to add a package which is older than the
one in the index, xbps-rindex will check if the package
reverts the one on the index. If so the package will be added
regardless of its version
- if the user wants to add a package which is newer than the
one on the index, xbps-rindex will check if the package on the
index reverts the one the user wants to add. If so the package
will be skipped regardless of its version.