JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
and logged a warning sing 4.83; now they are a configuration file error.
+JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
+ (lacking @domain). Apply the same qualification processing as RCPT.
+
Exim version 4.87
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