CHANGE: Rename product_* config options to release_* for consistency with productmd.
ACTION: Rename product_name, product_short, product_version, product_is_layered to release_* in config files.
Rename //variant/product to //variant/release in variants XML.
CHANGE: pkgset_koji_url and pkgset_koji_path_prefix config options replaced with koji_profile.
ACTION: Add 'koji_profile = "<profile_name>"' (use "koji" for Fedora) to config files.
You can safely remove and pkgset_koji_url and pkgset_koji_path_prefix from config files.
CHANGE: createrepo_c is config option now defaults to True.
ACTION: You can safely remove 'createrepo_c = True' from config files.
Set 'createrepo_c = False' if you need legacy createrepo.
CHANGE: createrepo_checksum config option is now mandatory.
ACTION: Add 'createrepo_checksum = "sha256"' (or "sha") to config files.
