Fix null ref in UrlGroup.Dispose due to logger not set

Author: NGloreous

src/Servers/HttpSys/src/NativeInterop/RequestQueue.cs

@@ -24,7 +24,7 @@ internal RequestQueue(string requestQueueName, string urlPrefix, ILogger logger,
         {
             try
             {
-                UrlGroup = new UrlGroup(this, UrlPrefix.Create(urlPrefix));
+                UrlGroup = new UrlGroup(this, UrlPrefix.Create(urlPrefix), logger);
             }
             catch
             {

src/Servers/HttpSys/src/NativeInterop/UrlGroup.cs

@@ -38,8 +38,10 @@ internal unsafe UrlGroup(ServerSession serverSession, ILogger logger)
             Id = urlGroupId;
         }
 
-        internal unsafe UrlGroup(RequestQueue requestQueue, UrlPrefix url)
+        internal unsafe UrlGroup(RequestQueue requestQueue, UrlPrefix url, ILogger logger)
         {
+            _logger = logger;
+
             ulong urlGroupId = 0;
             var statusCode = HttpApi.HttpFindUrlGroupId(
                 url.FullPrefix, requestQueue.Handle, &urlGroupId);

src/Servers/HttpSys/src/RequestProcessing/RequestContext.cs

@@ -326,6 +326,10 @@ private void SetFatalResponse(int status)
 
         internal unsafe void Delegate(DelegationRule destination)
         {
+            if (destination == null)
+            {
+                throw new ArgumentNullException(nameof(destination));
+            }
             if (Request.HasRequestBodyStarted)
             {
                 throw new InvalidOperationException("This request cannot be delegated, the request body has already started.");