Script for partial deb repositories mirroring with sanity check.

WARNING: This set of scripts is not designed to be used on 'live' repositories that are available to clients during synchronization, because it violates common synchronization order (packages first, metadata later) to provide partial mirroring capability. It means that repositories will be inconsistent during the update. Please use these scripts in conjunction with snapshots, on inactive repos, etc.

Only rsync mirrors are supported.