Fix typos in the cluster_name commit.

Thom Brown and Fujii Masao

doc/src/sgml/config.sgml

@@ -4142,7 +4142,7 @@ local0.*    /var/log/postgresql
         processes in this cluster. The name can be any string of less than
         <symbol>NAMEDATALEN</> characters (64 characters in a standard
         build). Only printable ASCII characters may be used in the
-        <varname>application_name</varname> value. Other characters will be
+        <varname>cluster_name</varname> value. Other characters will be
         replaced with question marks (<literal>?</literal>).  No name is shown
         if this parameter is set to the empty string <literal>''</> (which is
         the default). This parameter can only be set at server start.

doc/src/sgml/monitoring.sgml

@@ -93,7 +93,7 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
 
   <para>
    If <xref linkend="guc-cluster-name"> has been configured the
-   cluster name will also be show in <command>ps</> output:
+   cluster name will also be shown in <command>ps</> output:
 <screen>
 $ psql -c 'SHOW cluster_name'
  cluster_name