Security updates for Friday

Security updates have been issued by Debian (firefox-esr and unbound), Fedora (docker, libexif, and runc), openSUSE (mozilla-nss, python, rmt-server, and thunderbird), Slackware (mozilla), and SUSE (couchdb, dovecot23, kvm, nodejs6, php53, podofo, python-PyKMIP, rubygem-loofah, util-linux, and velum).