Right now in the HttpClient internal implementation, when a TLS based connection is established we pass along the SNI names to be used in the TLS handshake. However, once the connection is established, this information that was used during the connection creation isn't available through the jdk.internal.net.http.HttpConnection instance methods.

This issue proposes to introduce a getSNIServerNames() method on jdk.internal.net.http.HttpConnection to return this information.