Document STREQ_NULLABLE and STRNEQ_NULLABLE

HACKING

@@ -496,6 +496,13 @@ following semantically named macros
 
 
 
+- To avoid having to check if a or b are NULL:
+
+  STREQ_NULLABLE(a, b)
+  STRNEQ_NULLABLE(a, b)
+
+
+
 
 
 

docs/hacking.html.in

@@ -585,6 +585,12 @@
       <li><p>For strict equality of a prefix:</p>
 <pre>
   STRPREFIX(a,b)
+</pre>
+      </li>
+      <li><p>To avoid having to check if a or b are NULL:</p>
+<pre>
+  STREQ_NULLABLE(a, b)
+  STRNEQ_NULLABLE(a, b)
 </pre>
       </li>
     </ul>