Security updates for Monday

Security updates have been issued by Debian (amanda, ncurses, nghttp2, opendkim, rabbitmq-server, and roundcube), Fedora (golang-github-openprinting-ipp-usb, kernel, kernel-headers, kernel-tools, and samba), Mageia (audiofile, galera, libvpx, and virtualbox), Oracle (kernel and postgresql:13), SUSE (openssl-3, optipng, and python-Pillow), and Ubuntu (firefox).