Comment # 11 on bug 1173106 from Michal Suchanek

Suggested removal procedure

1) find all packages that provide multiversion(kernel)

2) out of these find packages that provide kernel-uname-r, and strip second
dash and anything that follows from the package name for the purpose of
applying keepspec

3) for each group of packages with the same name apply keepspec, non-matching
packages are scheduled for removal

4) for each package that is scheduled for removal also schedule debuginfo and
debugsource of the same version for removal

5) determine what additional packages would need to be removed to satisfy
dependencies, and schedule additional packages that match autoremove regexp(*)

6) if dependencies cannot be satisfied because some packages that do not match
autoremove regexp would have to be removed deschedule removal of some packages
(**) Typically a package depending on a KMP that depend on an old kernel
version would fall into this category.

*) can be lifted from original perl script

**) Note that with the original perl script some random package providing the
dependency would be preserved. With libzypp it should be possible to select
highest version that provides the dependency.