corrected typos, set vars

roles/base/tasks/system_setup/hosts.yml

@@ -7,4 +7,6 @@
     group: 'root'
   loop:
     - { ip: '192.168.1.240', fqdn: 'gitlab.social.my-wan.de'}
-  when: set_hosts is defined and set_hosts == true
+  when:
+    - set_hosts is defined
+    - set_hosts == true

roles/jitsimeet/tasks/install_jitsimeet.yml

@@ -16,11 +16,10 @@
 # - jitsi-meet-web-config
 # - jitsi-videobridge2
 
-- block
+- block:
   - name: jitsimeet | set debconf vars
     shell:
       cmd: "{{ playbook_dir }}/roles/jitsimeet/files/set_debconf.sh {{ jitsi_fqdn }}"
-
   - name: jitsimeet | install packages
     package:
       name: