Standardize config field names, and make drivers declare which fields they require

common/framework/drivers/mail/base.php

@@ -46,6 +46,26 @@ abstract class Base implements \Rhymix\Framework\Drivers\MailInterface
 		return class_basename(get_called_class());
 	}
 	
+	/**
+	 * Get the list of configuration fields required by this mail driver.
+	 * 
+	 * @return array
+	 */
+	public static function getRequiredConfig()
+	{
+		return array();
+	}
+	
+	/**
+	 * Get the list of API types supported by this mail driver.
+	 * 
+	 * @return array
+	 */
+	public static function getAPITypes()
+	{
+		return array();
+	}
+	
 	/**
 	 * Check if the current mail driver is supported on this server.
 	 *