Add new optional beta email parser thats based on ImapEngine instead of Webklex

plugins/vendor/symfony/polyfill-iconv/README.md

@@ -0,0 +1,14 @@
+Symfony Polyfill / Iconv
+========================
+
+This component provides a native PHP implementation of the
+[php.net/iconv](https://php.net/iconv) functions
+(short of [`ob_iconv_handler`](https://php.net/ob-iconv-handler)).
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/main/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).