Security updates for Monday

Security updates have been issued by Debian (libdatetime-timezone-perl and libvncserver), Fedora (chromium, kernel, kernel-headers, kernel-tools, krb5, libexif, libxml2, and thunderbird), Gentoo (chromium, libmaxminddb, and mit-krb5), Mageia (arpwatch, bluez, chromium-browser-stable, firefox and thunderbird, golang, java-1.8.0-op, kdeconnect-kde, kleopatra, libexif, lilypond, microcode, packagekit, ruby, and tpm2-tss), openSUSE (chromium, firefox, ImageMagick, kernel, openldap2, python-waitress, SDL, u-boot, ucode-intel, and zeromq), Oracle (fence-agents, firefox, freetype, kernel, python, python3, and thunderbird), Red Hat (rh-postgresql10-postgresql, rh-postgresql12-postgresql, and virt:8.2 and virt-devel:8.2), Slackware (seamonkey), and SUSE (firefox, gdm, kernel, and kernel-firmware).