implemented escapeLike() and modifiers %~like, %like~, %~like~

dibi/libs/interfaces.php

@@ -166,6 +166,14 @@ interface IDibiDriver
 	 */
 	function escape($value, $type);
 
+	/**
+	 * Encodes string for use in a LIKE statement.
+	 * @param  string
+	 * @param  int
+	 * @return string
+	 */
+	function escapeLike($value, $pos);
+
 	/**
 	 * Injects LIMIT/OFFSET to the SQL query.
 	 * @param  string &$sql  The SQL query that will be modified.