[apache] configure Munin to access server-status
role "apache" enable apache_* Munin plugin but it doesn't work without configuring Munin to access server-status.
We need to add these 2 lines at the end of /etc/munin/plugin-conf.d/munin-node file :
[apache_*] env.url http://127.0.0.1/server-status-NNNNN?auto
with NNNNN = apache_serverstatus_suffix