Change "superuser_reserved_connections" default to 3, because of

possible autovacuum use.

doc/src/sgml/config.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.80 2006/09/02 21:11:26 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.81 2006/09/02 23:04:20 momjian Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -383,7 +383,7 @@ SET ENABLE_SEQSCAN TO OFF;
        </para>
 
        <para>
-        The default value is 2. The value must be less than the value of
+        The default value is 3. The value must be less than the value of
         <varname>max_connections</varname>. This parameter can only be
         set at server start.
        </para>

src/backend/utils/misc/guc.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.348 2006/09/02 17:08:10 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.349 2006/09/02 23:04:20 momjian Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -1139,7 +1139,7 @@ static struct config_int ConfigureNamesInt[] =
 			NULL
 		},
 		&ReservedBackends,
-		2, 0, INT_MAX / 4, NULL, NULL
+		3, 0, INT_MAX / 4, NULL, NULL
 	},
 
 	{