manage murmur channels; install mumble-web's self-signed cert; add molecule default scenario

tasks/dhparam/begin.yml

@@ -0,0 +1,21 @@
+- name: Ensure Diffie-Hellman directory exists
+  file:
+    path: "{{ mumble_web_nginx_dhparam | dirname }}"
+    state: directory
+    owner: root
+    group: www-data
+    mode: "755"
+
+- name: Generate Diffie-Hellman parameters
+  # This can take a long time... So we are doing it in async mode
+  openssl_dhparam:
+      path: "{{ mumble_web_nginx_dhparam }}"
+      state: present
+      owner: root
+      group: www-data
+      mode: "640"
+      size: "{{ mumble_web_nginx_dhparam_size }}"
+  async: 3600
+  poll: 0
+  changed_when: no
+  register: _mumble_web_nginx_dhparam

tasks/dhparam/end.yml

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+- name: Waiting for Diffie-Hellman task to complete…
+  async_status:
+    jid: "{{ _mumble_web_nginx_dhparam.ansible_job_id }}"
+  register: _mumble_web_nginx_dhparam_job
+  retries: 60
+  delay: 30 # will retry every 30s for 30min (60 retries)
+  until: _mumble_web_nginx_dhparam_job.finished