The source project of this merge request has been removed.
Don't set tlsext_host_name for NonBlockingHTTPBOSH, because it has no _owner
NonBlockingHTTPBOSH instance has no attribute _owner and therefor the Server of the _owner cannot be set as tlsext_host_name. This should fix #8911. Maybe additional work is needed to make HTTPBOSH work with XEP-0368.