Fixes #5755 - Cannot configure maxDynamicTableSize on HTTP2Client.

Introduced `HTTP2Client.maxDynamicTableSize` and `HTTP2Client.maxHeaderBlockFragment`.

Signed-off-by: Simone Bordet <simone.bordet@gmail.com>

jetty-http2/http2-client/src/main/java/org/eclipse/jetty/http2/client/HTTP2Client.java

@@ -134,6 +134,8 @@ public class HTTP2Client extends ContainerLifeCycle
     private int maxFrameLength = Frame.DEFAULT_MAX_LENGTH;
     private int maxConcurrentPushedStreams = 32;
     private int maxSettingsKeys = SettingsFrame.DEFAULT_MAX_KEYS;
+    private int maxDynamicTableSize = 4096;
+    private int maxHeaderBlockFragment = 0;
     private FlowControlStrategy.Factory flowControlStrategyFactory = () -> new BufferingFlowControlStrategy(0.5F);
 
     @Override
@@ -372,6 +374,28 @@ public void setMaxSettingsKeys(int maxSettingsKeys)
         this.maxSettingsKeys = maxSettingsKeys;
     }
 
+    @ManagedAttribute("The HPACK dynamic table maximum size")
+    public int getMaxDynamicTableSize()
+    {
+        return maxDynamicTableSize;
+    }
+
+    public void setMaxDynamicTableSize(int maxDynamicTableSize)
+    {
+        this.maxDynamicTableSize = maxDynamicTableSize;
+    }
+
+    @ManagedAttribute("The max size of header block fragments")
+    public int getMaxHeaderBlockFragment()
+    {
+        return maxHeaderBlockFragment;
+    }
+
+    public void setMaxHeaderBlockFragment(int maxHeaderBlockFragment)
+    {
+        this.maxHeaderBlockFragment = maxHeaderBlockFragment;
+    }
+
     public void connect(InetSocketAddress address, Session.Listener listener, Promise<Session> promise)
     {
         connect(null, address, listener, promise);

jetty-http2/http2-client/src/main/java/org/eclipse/jetty/http2/client/HTTP2ClientConnectionFactory.java

@@ -63,7 +63,7 @@ public Connection newConnection(EndPoint endPoint, Map<String, Object> context)
         @SuppressWarnings("unchecked")
         Promise<Session> promise = (Promise<Session>)context.get(SESSION_PROMISE_CONTEXT_KEY);
 
-        Generator generator = new Generator(byteBufferPool);
+        Generator generator = new Generator(byteBufferPool, client.getMaxDynamicTableSize(), client.getMaxHeaderBlockFragment());
         FlowControlStrategy flowControl = client.getFlowControlStrategyFactory().newFlowControlStrategy();
         HTTP2ClientSession session = new HTTP2ClientSession(scheduler, endPoint, generator, listener, flowControl);
         session.setMaxRemoteStreams(client.getMaxConcurrentPushedStreams());