A minor typo fix on pg_standby docs

Rgds,
Arul Shaji
*** pgstandby.sgml    2007-12-06 14:52:18.000000000 +1100
--- new_pgstandby.sgml    2007-12-07 18:38:26.000000000 +1100
***************
*** 262,268 ****
       <listitem><para>keep the last 255 full WAL files, plus the current one</para></listitem>
       <listitem><para>sleep for 2 seconds between checks for next WAL file is full</para></listitem>
       <listitem><para>never timeout if file not found</para></listitem>
!      <listitem><para>stop waiting when a trigger file called /tmp.pgsql.trigger.5442 appears</para></listitem>
      </itemizedlist>
     </listitem>

--- 262,268 ----
       <listitem><para>keep the last 255 full WAL files, plus the current one</para></listitem>
       <listitem><para>sleep for 2 seconds between checks for next WAL file is full</para></listitem>
       <listitem><para>never timeout if file not found</para></listitem>
!      <listitem><para>stop waiting when a trigger file called /tmp/pgsql.trigger.5442 appears</para></listitem>
      </itemizedlist>
     </listitem>