IKEv1 default AH/ESP responder can cause libreswan to abort and restart

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SUSE CVE-2015-5300

The panicgate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds...