Correct directory names.

Thanks to Martin A. Marques <martin@math.unl.edu.ar> for the tip.

doc/src/sgml/installation.sgml

-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/installation.sgml,v 1.28 2000/11/05 20:52:59 petere Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/installation.sgml,v 1.29 2000/11/20 22:01:21 petere Exp $ -->
 
 <chapter id="installation">
  <title><![%flattext-install-include[<productname>PostgreSQL</> ]]>Installation Instructions</title>
@@ -232,8 +232,8 @@ su - postgres
    these commands while logged in to the special database user account
    (which you already have if you are upgrading).
 <programlisting>
-<userinput>/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/bin</>
-<userinput>/usr/local/pgsql/bin/postmaster -D /usr/local/pgsql/bin</>
+<userinput>/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data</>
+<userinput>/usr/local/pgsql/bin/postmaster -D /usr/local/pgsql/data</>
 </programlisting>
    Finally, restore your data with
 <screen>