Add index entry.

diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index b483127519266a5c337bb56bfbe050ac4dad3984..978f29c42d67316104a5c560eb1eb03940d2cf62 100644 (file)
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -1,8 +1,13 @@
-
+
 
 
  Frontend/Backend Protocol
 
+ 
+  protocol
+  frontend-backend
+ 
+
  
   PostgreSQL uses a message-based protocol
   for communication between frontends and backends (clients and servers).