Enabling SSL_CTX configuration by using SSL_CONF_cmd().

To perform various configuration operations on SSL_CTX, OpenSSL provides
SSL_CONF_cmd().  Specifically, to configure ciphers for a listener,
"CipherString" and "Ciphersuites" file commands are used:
https://www.openssl.org/docs/man1.1.1/man3/SSL_CONF_cmd.html


This feature can be configured in the "tls/conf_commands" section.

docs/changes.xml

@@ -37,6 +37,12 @@ PHP added to the default MIME type list.
 </para>
 </change>
 
+<change type="feature">
+<para>
+arbitrary configuration of TLS connections via OpenSSL commands.
+</para>
+</change>
+
 <change type="feature">
 <para>
 multiple "targets" in Python applications.