[RFE] Expose sack references

[Bob131]

There are several objects (DnfPackage, DnfReldepList, DnfReldep) that internally hold a reference to the DnfSack to which they belong, but don't expose API for getting this information; instead, the library user has to keep track of this information themselves which can get pretty hairy. It would be great if there were dnf_{package,reldeplist,reldep}_get_sack functions to make this less painful.

[Bob131]

I just noticed that dnf_package_get_sack is actually defined in hy-package.cpp, but it's exposed in neither hy-package.h nor dnf-package.h.

[dmach]

We're currently planning a new major version of the dnf stack (libdnf including). I'll add your request on the list.

[jan-kolarik]

This should be already addressed in dnf5. Closing this one.