PP/04 New "dns_use_edns0" global option.
+PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
+ Bugzilla 1098.
+
+PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
+ nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
+
Exim version 4.75
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