Updates Windows installation instructions to fix #4476

reference/pdo/configure.xml

@@ -26,13 +26,13 @@
     When installing PDO as a shared module, the php.ini file needs to be
     updated so that the PDO extension will be loaded automatically when PHP runs.
     You will also need to enable any database specific drivers there too;
-    make sure that they are listed after the pdo.so line, as PDO must be
+    make sure that they are listed after the extension=pdo line, as PDO must be
     initialized before the database-specific extensions can be loaded.
     If you built PDO and the database-specific extensions statically, you
     can skip this step.
     <screen>
 <![CDATA[
-extension=pdo.so
+extension=pdo
 ]]>
     </screen>
    </para>
@@ -42,21 +42,16 @@ extension=pdo.so
   <title>Windows users</title>
   <step>
    <para>
+    PDO is enabled by default.
     Choose the other database-specific DLL files and either use 
     <function>dl</function> to load them at runtime, or enable them in
-    &php.ini; below <filename>php_pdo.dll</filename>. For example:
+    &php.ini;. For example, this loads the
+    <link linkend="ref.pdo-sqlite">PDO_SQLITE</link> driver but
+    leaves the <link linkend="ref.pdo-odbc">PDO_ODBC</link> driver commented out:
     <screen>
 <![CDATA[
-extension=php_pdo.dll
-extension=php_pdo_firebird.dll
-extension=php_pdo_informix.dll
-extension=php_pdo_mssql.dll
-extension=php_pdo_mysql.dll
-extension=php_pdo_oci.dll
-extension=php_pdo_oci8.dll
-extension=php_pdo_odbc.dll
-extension=php_pdo_pgsql.dll
-extension=php_pdo_sqlite.dll  
+;extension=pdo_odbc
+extension=pdo_sqlite
 ]]>
     </screen>
    </para>