Server Name Indication (SNI) Support

Support for SNI was introduced in V11.0.1. SNI is an extension to the TLS protocol.

It enables Domino to support multiple virtual hosts over HTTPS when you have multiple hostnames mapped to a single IP address.

Note: ENABLE_SNI=1 enables the 11.0.1 SNI functionality that is only used as a fallback in V12 if the certstore.nsf is being used. It is still supported in V12 to avoid breaking compatibility on upgraded servers, but is obsolete if the server's TLS credentials are stored in certstore.nsf instead of keyring files.