Mention that TLS contexts reuse was implemented.
+5784. [func] Implement TLS-contexts reuse. Reusing the
+ previously created TLS context objects can reduce
+ initialisation time for some configurations and enables
+ TLS session resumption for incoming zone transfers over
+ TLS (XoT). [GL #3067]
+
5783. [func] named is now able to log TLS pre-master secrets for
debugging purposes. This requires setting the
SSLKEYLOGFILE environment variable appropriately.