SUSE: 2016:2476-1 Important: Systemd DoS Attack Mitigation

This update for systemd fixes the following security issue: - CVE-2016-7796: A zero-length message received over systemd's notification socket could make manager_dispatch_notify_fd() return an error and, as a side effect, disable the notification handler completely. As the notification socket is world-writable, this could have allowed a local user to perform a denial-of-service attack against systemd. (bsc#1001765) Additionally, the following non-security fixes are included: - Fix HMAC calculation when appending a data object to journal. (bsc#1000435) - Never accept file descriptors from file systems with mandatory locking enabled. (bsc#954374) - Do not warn about missing install info with "preset". (bsc#970293) - Save /run/systemd/users/UID before starting user@.service. (bsc#996269)