Security updates for Thursday

Security updates have been issued by Arch Linux (ansible-base, keycloak, mumble, and postgresql), Debian (firefox-esr and nodejs), Fedora (dotnet3.1, dotnet5.0, keylime, php-horde-Horde-Text-Filter, radare2, scap-security-guide, and wireshark), openSUSE (postgresql, postgresql13 and python-djangorestframework), Red Hat (Ansible, firefox, and thunderbird), Scientific Linux (firefox and thunderbird), SUSE (php7, postgresql-jdbc, python-cryptography, rpmlint, and webkit2gtk3), and Ubuntu (dnsmasq, linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4, linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon, linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi, linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon, linux-oem-5.10, linux-oem-5.6, screen, and xterm).