Security updates for Monday

Security updates have been issued by Debian (curl, icecast2, mupdf, and ruby2.3), Fedora (lldpad, NetworkManager, python-django, roundcubemail, thunderbird, webkit2gtk3, xen, and xorg-x11-server), Mageia (axis, cimg, gmic, dnsmasq, gitolite, gnutls, java-1.8.0-openjdk, lighttpd, mbedtls, mediawiki, perl-Dancer2, python-cryptography, and virtualbox), Red Hat (openvswitch, Red Hat Virtualization, and thunderbird), SUSE (curl, ffmpeg, and soundtouch), and Ubuntu (network-manager and systemd).