PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
Bugzilla 1098.
-PP/06 Extra paranoia around STARTTLS-with-data-in-buffer.
+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
+
+PP/07 Catch divide-by-zero in ${eval:...}.
+ Fixes bugzilla 1102.
Exim version 4.75