Security updates for Thursday

Security updates have been issued by CentOS (python-paramiko and thunderbird), Debian (firefox-esr, libdatetime-timezone-perl, and mariadb-10.0), Fedora (curl, NetworkManager, and xorg-x11-server), openSUSE (kernel), Oracle (java-1.7.0-openjdk, python-paramiko, thunderbird, and xorg-x11-server), Red Hat (java-11-openjdk and spice-server), SUSE (firefox, kernel, and SDL_image), and Ubuntu (nginx).