Security updates for Friday

Security updates have been issued by Arch Linux (firefox), CentOS (firefox), Debian (389-ds-base, openjdk-8, thunderbird, and xorg-server), Fedora (firefox), openSUSE (GraphicsMagick, jhead, mysql-community-server, ntp, postgresql96, python-cryptography, rust, tomcat, webkit2gtk3, and zziplib), Scientific Linux (firefox), and SUSE (clamav, firefox, ImageMagick, libgit2, net-snmp, smt, wpa_supplicant, and xorg-x11-server).