adding constants

plugins/mail_fetch/constants.php

@@ -0,0 +1,16 @@
+<?php
+/**
+ *
+ */
+
+/** RFC 1939 USER authentication */
+define('MAIL_FETCH_AUTH_USER',1);
+/** RFC 1939 APOP authentication */
+define('MAIL_FETCH_AUTH_APOP',2);
+/** All authentication methods described in RFC 1939 */
+define('MAIL_FETCH_AUTH_RFC1939',3);
+
+/** Connection types */
+define('MAIL_FETCH_USE_PLAIN',0);
+define('MAIL_FETCH_USE_TLS',1);
+define('MAIL_FETCH_USE_STLS',2);