added db2 support

git-svn-id: http://svn.php.net/repository/pear/packages/DBA/trunk@97428 c90b9560-bf6c-de11-be94-00142212c4b1

DBA.php

@@ -57,11 +57,11 @@ function &create($driver = 'file')
         if (!function_exists('dba_open') || ($driver=='file')) {
             require_once 'DBA/Driver/File.php';
             return new DBA_Driver_File();
-        } elseif (($driver == 'db3') || ($driver == 'gdbm')) {
+        } elseif (in_array($driver, DBA::getDriverList()) {
             require_once 'DBA/Driver/Builtin.php';
             return new DBA_Driver_Builtin($driver);
         } else {
-            return PEAR::raiseError('Unknown DBA driver, '.$driver);
+            return PEAR::raiseError('Unsupported DBA driver, '.$driver);
         }
     }
 
@@ -94,7 +94,7 @@ function db_exists($name, $driver = 'file')
      */
     function getDriverList()
     {
-        return array('gdbm', 'db3', 'file');
+        return array('gdbm', 'db3', 'db2', 'file');
     }
 }
 ?>