Option renamed to DefaultRelationshipLinks and changed to Link type

Author: Milos

src/JsonApiDotNetCore/Builders/DocumentBuilder.cs

@@ -168,7 +168,7 @@ private RelationshipData GetRelationshipData(RelationshipAttribute attr, Context
 
             var relationshipData = new RelationshipData();
 
-            if (!_jsonApiContext.Options.DisableSelfAndRelatedLinks && attr.DocumentLinks.HasFlag(Link.None) == false)
+            if (_jsonApiContext.Options.DefaultRelationshipLinks.HasFlag(Link.None) == false && attr.DocumentLinks.HasFlag(Link.None) == false)
             {
                 relationshipData.Links = new Links();
                 if (attr.DocumentLinks.HasFlag(Link.Self))

src/JsonApiDotNetCore/Configuration/JsonApiOptions.cs

@@ -103,14 +103,24 @@ public class JsonApiOptions
         public bool RelativeLinks { get; set; }
 
         /// <summary>
-        /// Whether or not to include self and related links 
+        /// Which links to include in relationships. Defaults to <see cref="Link.All"/>.
         /// </summary>
         /// <example>
         /// <code>
-        /// options.DisableSelfAndRelatedLinks = true;
+        /// options.DefaultRelationshipLinks = Link.None;
+        /// </code>
+        /// <code>
+        /// {
+        ///   "type": "articles",
+        ///   "id": "4309",
+        ///   "relationships": {
+        ///      "author": {}
+        ///      }
+        ///   }
+        /// }
         /// </code>
         /// </example>
-        public bool DisableSelfAndRelatedLinks { get; set; }
+        public Link DefaultRelationshipLinks { get; set; } = Link.All;
 
         /// <summary>
         /// Whether or not to allow all custom query parameters.

test/UnitTests/Builders/DocumentBuilder_Tests.cs

@@ -130,7 +130,7 @@ public void Related_Links_Can_Be_Disabled_Globally()
             _pageManager.TotalRecords = 1;
             _pageManager.CurrentPage = 1;
 
-            _options.DisableSelfAndRelatedLinks = true;
+            _options.DefaultRelationshipLinks = Link.None;
 
             _jsonApiContextMock
                 .Setup(m => m.ResourceGraph)