Use "excludepkgs" config as well as "exclude"
Use "excludepkgs" config as well as "exclude"

Currently dnf_repo_set_keyfile_data only checks the "exclude" setting,
but DNF renamed that to "excludepkgs" years ago. This patch reads both
and combines them into a single set of excluded packages.

This doesn't solve the problem of missing support for wildcards here.

See https://github.com/rpm-software-management/libdnf/issues/303 for
some related discussion.

rpm-software-management/libhif,hughsie/libhif,rpm-software-management/libdnf,rpm-software-management/libdnf,rpm-software-management/libdnf,hughsie/libhif,rpm-software-management/libhif,hughsie/libhif,rpm-software-management/libhif,hughsie/libhif,rpm-software-management/libhif,rpm-software-management/libdnf