add Whonix apt repository to /etc/sources.list.d/whonix.list using the whonix_repository tool
renamed variable DISTRUST_WHONIX_APT_REPO to WHONIX_APT_REPOSITORY_DISTRUST_ENV
renamed variable WHONIX_APT_REPOSITORY_DISTRUST to WHONIX_APT_REPOSITORY_DISTRUST_CONFIG
renamed whonix_shared/usr/share/whonix/postinst.d/70_whonix_deb_key -> whonix_shared/usr/share/whonix/postinst.d/70_whonix_apt_key