[java] add deprecation notices to Grid logs and Java stdout

java/src/org/openqa/selenium/remote/ProtocolHandshake.java

@@ -37,10 +37,12 @@
 import java.io.InputStream;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.function.Function;
 import java.util.logging.Logger;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import static com.google.common.net.HttpHeaders.CONTENT_LENGTH;
@@ -63,7 +65,19 @@ public Result createSession(HttpHandler client, Command command) throws IOExcept
 
       if (result.isRight()) {
         Result toReturn = result.right();
-        LOG.info(String.format("Detected dialect: %s", toReturn.dialect));
+        LOG.info(String.format("Detected upstream dialect: %s", toReturn.dialect));
+
+        List<String> invalid = desired.asMap().keySet()
+          .stream()
+          .filter(key -> !(new AcceptedW3CCapabilityKeys().test(key)))
+          .collect(Collectors.toList());
+
+        if (!invalid.isEmpty()) {
+          LOG.warning(String.format("Support for Legacy Capabilities is deprecated; " +
+              "You are sending the following invalid capabilities: %s; " +
+              "Please update to W3C Syntax: https://www.selenium.dev/blog/2022/legacy-protocol-support/",
+            invalid));
+        }
         return toReturn;
       } else {
         throw result.left();