This reverts commit be7d8cfaf1.
This commit missed some previous copyrights mentioned,
in general I think its better to have this per-file to
follow who wrote what and when.
xbps-{alternatives,pkgdb,reconfigure}: xbps_pkgdb_update()
has been fixed to flush when told so, and we don't need
to update the in-memory copy because we are exiting.
