Security updates for Monday

Security updates have been issued by Arch Linux (awstats, busybox, dotnet-runtime, dotnet-runtime-3.1, dotnet-sdk, dotnet-sdk-3.1, gitlab, godot, groovy, libebml, mkinitcpio-busybox, openssl, python2, vivaldi, webkit2gtk, and wpewebkit), CentOS (firefox and thunderbird), Debian (pygments, spamassassin, thunderbird, and webkit2gtk), Fedora (CGAL, dotnet3.1, dotnet5.0, firefox, kernel, qt, and xen), Mageia (imagemagick, jackson-databind, openscad, redis, and unbound), openSUSE (evolution-data-server, go1.15, and zstd), Oracle (firefox, openssl, and thunderbird), Red Hat (flatpak), Slackware (xterm), and Ubuntu (squid, squid3 and webkit2gtk).