Weekend security updates

Security updates have been issued by Debian (ejabberd, jhead, and samba), Fedora (chromium, drupal8, empathy, erlang, firefox, icoutils, kernel, knot-resolver, libICE, libupnp, libXdmcp, links, mbedtls, moodle, mupdf, ntp, openslp, R, rkward, rpy, sane-backends, sscg, tcpreplay, thunderbird, and webkitgtk4), Mageia (kernel, kernel-linus, and kernel-tmb), openSUSE (apache2, Chromium, kernel, and virglrenderer), Oracle (kernel), and Slackware (samba).