autodetect MAJOR changes in rpm package

[fedya]

autodetect MAJOR changes in rpm package
How it works now, e.g. libusb:

1. libusb pushed new upgrade from 1.0 to 2.0
2. libusb.so.0 changed to libusb.so.1
   that's mean that we need to rebuild all dependent packages of libusb0 to libusb1

What need to automate:
Push to abf json data info about libusb changes, it's possible with simple compare of
current package in repo and built package in container.

I think need just to update json model for it.

[berolinux]

Would be even better to check for any Provides gone away -- whether it's libusb.so.0 going away in favor of libusb.so.1 or some manual Provides: going away (e.g. when cleaning up a spec that has some prehistoric Provides: that was necessary at some point to replace something else -- let's say a Provides: sendmail in the postfix package), it's useful to know if anything still requires the thing being removed.

Even better: Also add a "automatically rebuild everything affected by this" option.

[Conan-Kudo]

This wouldn't be terribly difficult to orchestrate using the DNF API. Fedora has an implementation like this in Koschei. That could be adapted for our purpose in some way...