Implement more ServicePoint properties

src/libraries/System.Net.Requests/src/System/Net/HttpWebRequest.cs

@@ -806,10 +806,12 @@ public Version ProtocolVersion
                 if (value.Equals(HttpVersion.Version11))
                 {
                     IsVersionHttp10 = false;
+                    ServicePoint.ProtocolVersion = HttpVersion.Version11;
                 }
                 else if (value.Equals(HttpVersion.Version10))
                 {
                     IsVersionHttp10 = true;
+                    ServicePoint.ProtocolVersion = HttpVersion.Version10;
                 }
                 else
                 {
@@ -1621,6 +1623,13 @@ private static HttpClient CreateHttpClient(HttpClientParameters parameters, Http
                     handler.UseCookies = false;
                 }
 
+                if (parameters.ServicePoint is { } servicePoint)
+                {
+                    handler.MaxConnectionsPerServer = servicePoint.ConnectionLimit;
+                    handler.PooledConnectionIdleTimeout = servicePoint.MaxIdleTime == -1 ? Threading.Timeout.InfiniteTimeSpan : TimeSpan.FromMilliseconds(servicePoint.MaxIdleTime);
+                    handler.PooledConnectionLifetime = servicePoint.ConnectionLeaseTimeout == -1 ? Threading.Timeout.InfiniteTimeSpan : TimeSpan.FromMilliseconds(servicePoint.ConnectionLeaseTimeout);
+                }
+
                 Debug.Assert(handler.UseProxy); // Default of handler.UseProxy is true.
                 Debug.Assert(handler.Proxy == null); // Default of handler.Proxy is null.