JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
the ordering of its ARC headers. This caused a crash.
+JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
+ a new record was being constructed with information from the peer, a trap
+ was taken.
+
Exim version 4.93
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