fix the include path for our second use of z-push

conf/nginx.conf

@@ -69,6 +69,7 @@ server {
 	location /autodiscover/autodiscover.xml {
 		include fastcgi_params;
 		fastcgi_param SCRIPT_FILENAME /usr/local/lib/z-push/autodiscover/autodiscover.php;
+		fastcgi_param PHP_VALUE "include_path=.:/usr/share/php:/usr/share/pear:/usr/share/awl/inc";
 		fastcgi_pass php-fpm;
 	}