Find and fix by Gavan. Although NetBSD is not a supported platform for
4.94 this bug could affect other platforms.
+PP/01 Fix default prime selection to be consistent.
+ One path used ike23 still, instead of exim.dev.20160529.3; now both
+ execution flows will use the same DH primes (currently
+ exim.dev.20160529.3).
+
Exim version 4.94
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