Security updates for Thursday

Security updates have been issued by Mageia (cimg, pngcheck, poppler, tor, and xdg-utils), openSUSE (mariadb), Red Hat (go-toolset-1.14-golang), and Ubuntu (linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon).