Debian packaging files

[nickbroon]

There appears to be two complete sets of debian packaging files, which are similar but slightly different:

diff -r --ignore-all-space debian packaging/debian

Why are there two debian packages directories? Which is used? Can one set be removed?

(As minor related; I think packaging/debian/librdkafka.dsc could be removed; as .dsc files are generated output by debian packaging tools from the debian/control files)