[Rpm-maint] [rpm-software-management/rpm] Rust bindings for rpmlib (#429)

[Jeff Johnson]

Re using rust iterator S w ref counting

The match iterator does a ref++ followed by a ref-- at the end of an iteration which guarantees that the header and MINMEM tag data exist for each iteration.

Do an additional ref++ using *Link() if you want to make a header persistent for further processing outside of an iteration (but don't forget the ref-- using *Free() or you will have a huge memory leak ;-)

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