Fix typo.

Fujii Masao

doc/src/sgml/config.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.264 2010/04/12 22:09:58 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.265 2010/04/13 08:19:12 mha Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -1733,7 +1733,7 @@ SET ENABLE_SEQSCAN TO OFF;
         <varname>archive_mode</> is enabled, WAL archiving is temporarily
         disabled, but the server continues to accumulate WAL segment files in
         the expectation that a command will soon be provided.  Setting
-        <varname>archive_mode</> to a command that does nothing but
+        <varname>archive_command</> to a command that does nothing but
         return true, e.g. <literal>/bin/true</>, effectively disables
         archiving, but also breaks the chain of WAL files needed for
         archive recovery, so it should only be used in unusual circumstances.