Manual.rst: add libxrender1 to instal by using wkhtmltopdf.

eb731863 · Carsten Rose · 1c9e8b7a · eb731863
Commit eb731863 authored May 01, 2017 by Carsten Rose
--- a/extension/Documentation/Manual.rst
+++ b/extension/Documentation/Manual.rst
@@ -48,7 +48,8 @@ Preparation for Ubuntu 14.04::

 Preparation steps for Ubuntu 16.04::

-	sudo apt install php7.0-intl pdftk
+	sudo apt install php7.0-intl
+	sudo apt install pdftk libxrender1        # for PDF and 'HTML to PDF' (wkhtmltopdf)

 wkhtmltopdf
 ^^^^^^^^^^^