dead before release of memory in the daemon loop. This stops complaints
about them when the debug_store option is enabled. Discovered specifically
for sender_rate_period, but applies to a whole set of variables.
+ Do the same for the queue-runner loop, for variables set from spool
+ message files.
+
+PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
+ tls_require_ciphers is used as before.
Exim version 4.90