Automatic assigment of "worker_processes" in nginx (#1252)

* Upgrade of nginx config by default reference

lib/configfiles/focal.xml

@@ -167,8 +167,9 @@ include_shell "/usr/share/lighttpd/include-conf-enabled.pl"
 					<file name="/etc/nginx/nginx.conf" backup="true">
 						<content><![CDATA[
 user www-data;
-worker_processes 4;
+worker_processes auto;
 pid /var/run/nginx.pid;
+include /etc/nginx/modules-enabled/*.conf;
 
 events {
 	worker_connections 768;