Meta-schema for "targetHints"

This intentionally does not set the type, as having an object
value is only a SHOULD and may not be appropriate for all
protocols.

Author: handrews

hyper-schema.json

@@ -37,6 +37,9 @@
                     "description": "JSON Schema describing the link target",
                     "allOf": [ { "$ref": "#" } ]
                 },
+                "targetHints": {
+                    "description": "JSON representation of likely metadata such as response headers, with a protocol-dependent format"
+                },
                 "mediaType": {
                     "description": "media type (as defined by RFC 2046) describing the link target",
                     "type": "string"