[css-multicol-2] Suppress errors that only arise from this being a delta spec.

Author: tabatkins

css-multicol-2/Overview.bs

@@ -14,8 +14,9 @@ Abstract: This is a delta specification over CSS Multi-column Level 1.
           its content will be integrated into this specification,
           which will then replace it.
           Until then, CSS Multi-column Level 2 only contains additions and extensions to level 1
-Ignored Terms: column-width, column-count, columns, column-gap, column-rule-color, column-rule-style, column-rule-width, column-rule, column-fill
+Ignored Terms: column-width, column-count, columns, column-gap, column-rule-color, column-rule-style, column-rule-width, column-rule, column-fill, multi-column element
                <!-- remove line above once this is no longer a delta spec -->
+Ignored Vars: column-gap, column-width
 </pre>
 
 <style type="text/css">
@@ -227,3 +228,8 @@ Acknowledgments</h2>
 	Contributors include:
 
 	Issue: Add final level 1 contributor list
+
+<h2 class="no-num" id=priv-sec>
+Privacy and Security Considerations</h2>
+
+	Delta spec lol