Resolve "XoT breaks DDNS update forwarding"
Fix dynamic update forwarding when using a TLS-enabled primary
Now that the 'dns_request' supports using TLS transport, implement dynamic update forwarding using DoT when the primary server is configured to use a TLS transport.
Previously, when using such configuration, the dynamic update forwarding feature was broken.
Closes #3512 (closed)
Edited by Arаm Sаrgsyаn