tls: set servername on client side too

Backport-PR-URL: #18050 Backport-PR-URL: #20456 PR-URL: #17935 Reviewed-By: Anatoli Papirovski <[email protected]> Reviewed-By: Sebastiaan Deckers <[email protected]> Reviewed-By: Tiancheng "Timothy" Gu <[email protected]>

Author: jasnell

lib/_tls_wrap.js

@@ -628,7 +628,7 @@ TLSSocket.prototype._finishInit = function(){
 this.alpnProtocol=this.ssl.getALPNNegotiatedProtocol();
 }
 
-if(process.features.tls_sni&&this._tlsOptions.isServer){
+if(process.features.tls_sni){
 this.servername=this._handle.getServername();
 }