Security updates for Monday

Security updates have been issued by Arch Linux (chromium, libpng, and openssh), Debian (checkstyle, evolution, gst-plugins-base0.10, gst-plugins-base1.0, imagemagick, libpng1.6, monit, and systemd), Fedora (aria2, php-symfony, php-symfony3, php-symfony4, and python-jinja2), openSUSE (ceph, libssh2_org, libvirt, php7, python3, samba, wget, and xerces-c), Red Hat (rh-python35-python), Slackware (bind), SUSE (libssh2_org), and Ubuntu (evince, gst-plugins-base0.10, gst-plugins-base1.0, and mysql-5.7).