Security updates for Friday

Security updates have been issued by Debian (agg, golang-1.7, golang-1.8, mariadb-10.0, and postgis), Fedora (kernel, kernel-headers, and kernel-tools), Mageia (gitolite and libvorbis), openSUSE (pdns-recursor and webkit2gtk3), Oracle (firefox, ghostscript, kernel, polkit, spice, and spice-server), Red Hat (etcd, ghostscript, polkit, spice, and spice-server), Scientific Linux (ghostscript, polkit, spice, and spice-server), SUSE (python3), and Ubuntu (libvncserver).