Optional/MSVC 6.x-7.0 markup

[SVN r25445]

status/explicit-failures-markup.xml

@@ -569,6 +569,19 @@ for more information.
         </mark-unusable>
     </library>
 
+
+    <!-- optional -->
+    <library name="optional">
+        <mark-expected-failures>
+            <test name="optional_test_ref"/>
+            <toolset name="msvc"/>
+            <toolset name="msvc-stlport"/>
+            <toolset name="vc7"/>
+            <note author="Aleksey Gurtovoy" refid="3"/>
+        </mark-expected-failures>
+    </library>
+
+
     <!-- serialization -->
     <library name="serialization">
         <mark-unusable>