Rename fathom subdomain to stats and make it a variable.

README.md

 * `mail.example.com`
 * `www.example.com` (for Web hosting)
 * `autoconfig.example.com` (for email client automatic configuration)
-* `fathom.example.com` (for web stats)
+* `stats.example.com` (for web stats)
 * `news.example.com` (for Selfoss)
 * `cloud.example.com` (for NextCloud)
 * `git.example.com` (for gitea)

roles/blog/defaults/main.yml

 fathom_db_password: "{{ lookup('password', secret + '/' + 'fathom_db_password length=32') }}"
 fathom_db_database: 'fathom'
 
+fathom_subdomain: 'stats'
 fathom_internal_port: '9000'
 fathom_secret: "{{ lookup('password', secret + '/' + 'fathom_secret length=32') }}"
 

roles/blog/templates/etc_apache2_sites-available_fathom.j2

 <VirtualHost *:80>
-    ServerName fathom.{{ item.name }}
+    ServerName {{ fathom_subdomain }}.{{ item.name }}
 
-    Redirect temp / https://fathom.{{ item.name }}/
+    Redirect temp / https://{{ fathom_subdomain }}.{{ item.name }}/
 </VirtualHost>
 
 <VirtualHost *:443>
-    ServerName fathom.{{ item.name }}
+    ServerName {{ fathom_subdomain }}.{{ item.name }}
 
     SSLEngine               On
     DocumentRoot            "{{ item.doc_root }}"

roles/blog/templates/var_www_blog_index.j2

 	m=f.getElementsByTagName('script')[0];
 	o.async=1; o.src=t; o.id='fathom-script';
 	m.parentNode.insertBefore(o,m)
-})(document, window, '//fathom.{{ domain }}/tracker.js', 'fathom');
+})(document, window, '//{{ fathom_subdomain }}.{{ domain }}/tracker.js', 'fathom');
 fathom('set', 'siteId', 'JTPIK');
 fathom('trackPageview');
 		</script>

roles/common/files/letsencrypt-gencert

   fi
 
   # subdomains - www.foo.com mail.foo.com ...
-  for sub in www mail autoconfig fathom news cloud git matrix status social comments iot; do
+  for sub in www mail autoconfig stats news cloud git matrix status social comments iot; do
     # only add if the DNS entry for the subdomain does actually exist
     if (getent hosts $sub.$domain > /dev/null); then
       if [ -z "$d" ]; then