Log SNI-less attempt for fun

src/github.com/turt2live/matrix-media-repo/matrix/federation.go

@@ -88,6 +88,7 @@ func FederatedGet(url string, realHost string) (*http.Response, error) {
 				InsecureSkipVerify: true,
 			})
 			if err := conn.Handshake(); err != nil {
+				logrus.Warn("Handshake failed due to ", err, ". Attempting handshake without SNI.");
 				// ...however there are reasons for some servers NOT supplying the correct SNI, so fallback to not providing one.
 				conn := tls.Client(rawconn, &tls.Config{
 					ServerName: "", // An empty ServerName means we will not try to verify it.