fix PHP path for Z-Push so it can see libawl-php

broken in 04454b35

fixes #143

conf/nginx.conf

@@ -69,6 +69,7 @@ server {
 	location /Microsoft-Server-ActiveSync {
 		include /etc/nginx/fastcgi_params;
 		fastcgi_param SCRIPT_FILENAME /usr/local/lib/z-push/index.php;
+		fastcgi_param PHP_VALUE "include_path=.:/usr/share/php:/usr/share/pear:/usr/share/awl/inc";
 		fastcgi_read_timeout 630;
 		fastcgi_pass php-fpm;
 	}