Security updates for Monday

Security updates have been issued by Debian (cimg, golang-1.7, golang-1.8, krb5, mediawiki, mupdf, php-pear, samba, thunderbird, and zabbix), Fedora (chromium, krb5, microcode_ctl, pngcheck, and rpki-client), Mageia (librepo, postgresql, python-twisted, raptor2, tcpdump, and thunderbird), openSUSE (blueman, java-11-openjdk, moinmoin-wiki, python, rmt-server, SDL, and tcpdump), Red Hat (chromium-browser and thunderbird), SUSE (c-ares, ceph, dash, firefox, java-1_8_0-openjdk, postgresql10, postgresql12, postgresql96, u-boot, and ucode-intel), and Ubuntu (openldap).