Security updates for Wednesday

Security updates have been issued by Debian (python-django), openSUSE (curl and libtasn1), Oracle (kernel), Red Hat (etcd, kernel-alt, and rh-python36-python-jinja2), Scientific Linux (thunderbird), SUSE (libvirt), and Ubuntu (db5.3, linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2, linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2, linux-snapdragon, linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon, linux-aws-hwe, linux-hwe, linux-oracle, linux-hwe, and linux-raspi2, linux-snapdragon).