corrected typos, set vars

host_vars/debian-test.universe.local.yml

@@ -1,2 +1,3 @@
 ---
 netdata: true
+set_hosts: true

host_vars/mewimeet.de.yml

@@ -14,6 +14,7 @@ raspberry_pi: false
 preinstalled: true
 
 # server
+set_hosts: false
 unattended_upgrades: true
 web_server: true
 netdata: true

host_vars/ubuntu-test.universe.local.yml

@@ -2,4 +2,5 @@
 copy_ssh_priv_keys: true
 netdata: true
 webserver: true
-nginx: true
+nginx: true
+set_hosts: true