GetEndpoints: Eliminate duplicate endpoints when Configured base addr…

…esses differ by port only (#1687)

- use case: specify the same endpoint protocol with two ports. The returned array  contains too many entries, because now the policyId in the UserTokenpolicies was fixed and no more duplicates were detected.

Stack/Opc.Ua.Core/Stack/Server/ServerBase.cs

@@ -1078,6 +1078,12 @@ private static string GetBestDiscoveryUrl(Uri clientUrl, BaseAddress baseAddress
                         continue;
                     }
 
+                    if (endpointUrl.Port != baseAddress.Url.Port)
+                    {
+                        continue;
+                    }
+
+
                     EndpointDescription translation = new EndpointDescription();
 
                     translation.EndpointUrl = baseAddress.Url.ToString();
@@ -1097,22 +1103,8 @@ private static string GetBestDiscoveryUrl(Uri clientUrl, BaseAddress baseAddress
                     translation.UserIdentityTokens = endpoint.UserIdentityTokens;
                     translation.Server = application;
 
-                    // skip duplicates.
-                    bool duplicateFound = false;
+                    translations.Add(translation);
 
-                    foreach (EndpointDescription existingTranslation in translations)
-                    {
-                        if (existingTranslation.IsEqual(translation))
-                        {
-                            duplicateFound = true;
-                            break;
-                        }
-                    }
-
-                    if (!duplicateFound)
-                    {
-                        translations.Add(translation);
-                    }
                 }
             }