If an article in the release documentation has a table of contents,

make it go down to 3 section levels (the default depth for FreeBSD
articles is 1 level, but few articles have tables-of-contents
enabled).

release/doc/en_US.ISO8859-1/share/sgml/release.dsl

@@ -65,6 +65,12 @@
 	  (string-append "http://www.FreeBSD.org/cgi/man.cgi?query="
 			 refentrytitle "&" "sektion=" manvolnum))
       ]]>
+
+      (define (toc-depth nd)
+        (if (string=? (gi nd) (normalize "book"))
+            3
+            3))
+
     </style-specification-body>
   </style-specification>