doc: add missing sect1 close tag

bmomjian · bmomjian · commit 885fea5a34b0 · 2017-04-13T13:12:58.000-04:00
Fixes commit 4f3b87a
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
@@ -1470,7 +1470,7 @@ the password is in.
 </step>
 </procedure>
 </sect2>
-
+</sect1>
 
 <sect1 id="protocol-replication">
 <title>Streaming Replication Protocol</title>
