Security updates for Monday

Security updates have been issued by Debian (gnuplot5, icecast2, liblivemedia, otrs2, phpbb3, roundcube, squid3, and xml-security-c), Fedora (kio-extras, tmux, and xen), Gentoo (asterisk, chromium, exiv2, ghostscript-gpl, and thunderbird), openSUSE (libwpd, openssl, openssl-1_1, postgresql10, and SDL2_image), Red Hat (chromium-browser, rh-mysql57-mysql, rh-nginx110-nginx, and rh-nginx18-nginx), SUSE (exiv2, libgcrypt, rpm, and tiff), and Ubuntu (firefox and qemu).