Instead of parsing out the DSN for the class we should load, specify …

…it in the DB's config array. This lets us break out DB types that aren't directly recognizable from the DSN.

classes/db.php

@@ -36,9 +36,7 @@ public static function factory ( $environment = null, $config = null ) {
 				$config = Kohana::config( 'db' )->$environment;
 			}
 
-			list($engine) = explode(':', $config['dsn'], 2);
-
-			$class = 'DB_Connection_' . $engine;
+			$class = 'DB_Connection_' . $config['type'];
 
 			// create the instance
 			$instance = new $class( $environment, $config );