Fix for CVE-2019-10155 (IKEv1 information exchange packet's integrity check
value is not verified)
- cleanup warnings in delete_connection() [Bart Trojanowski]
- tests: cleanup warnings in libpluto unit tests [Bart Trojanowski]
- tests: cleanup warnings in libopenswan unit tests [Bart Trojanowski]
- tests: add quick_mode_hash12() to libpluto seam code [Bart Trojanowski]
- ikev1: hack to check informational payloads [Andrew Cagney
(from Libreswan commit 9391eab9)]