restructured tasks such that subtask files are included

this is a preparation for installing certbot from package management
additionally, it might be useful when further tasks are added, e.g. for initial certificate retrieval

tasks/install-from-git.yml

@@ -0,0 +1,13 @@
+---
+- name: Clone Certbot into configured directory.
+  git:
+    repo: "{{ certbot_repo }}"
+    dest: "{{ certbot_dir }}"
+    version: "{{ certbot_version }}"
+    update: "{{ certbot_keep_updated }}"
+    force: yes
+
+- name: Ensure certbot-auto is executable.
+  file:
+    path: "{{ certbot_dir }}/certbot-auto"
+    mode: 0755

tasks/main.yml

@@ -1,22 +1,5 @@
 ---
-- name: Clone Certbot into configured directory.
-  git:
-    repo: "{{ certbot_repo }}"
-    dest: "{{ certbot_dir }}"
-    version: "{{ certbot_version }}"
-    update: "{{ certbot_keep_updated }}"
-    force: yes
+- include: install-from-git.yml
 
-- name: Ensure certbot-auto is executable.
-  file:
-    path: "{{ certbot_dir }}/certbot-auto"
-    mode: 0755
-
-- name: Add cron job for 'certbot-auto renew' (if configured).
-  cron:
-    name: Certbot automatic renewal.
-    job: "{{ certbot_dir }}/certbot-auto renew --quiet --no-self-upgrade"
-    minute: "{{ certbot_auto_renew_minute }}"
-    hour: "{{ certbot_auto_renew_hour }}"
-    user: "{{ certbot_auto_renew_user }}"
+- include: renew-cron.yml
   when: certbot_auto_renew

tasks/renew-cron.yml

@@ -0,0 +1,8 @@
+---
+- name: Add cron job for 'certbot-auto renew' (if configured).
+  cron:
+    name: Certbot automatic renewal.
+    job: "{{ certbot_dir }}/certbot-auto renew --quiet --no-self-upgrade"
+    minute: "{{ certbot_auto_renew_minute }}"
+    hour: "{{ certbot_auto_renew_hour }}"
+    user: "{{ certbot_auto_renew_user }}"