post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
exists, just to get a clock slightly more aligned to reality.
+JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
+ RFC says it is optional some validators care. The missing char was not
+ intended but triggered by a line-wrap alignement. Discovery and fix by
+ Guillaume Outters, hacked on by JH.
+
Exim version 4.94
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