JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
a null-indirection SIGSEGV for the receive process.
+JH/33 Fix free for live variable $value created by a ${run ...} expansion.
+ Although not seen, this could have resulted in a SIGSEGV.
+
Exim version 4.96
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