Install passlib module for default Python version.

Referencing the package to install by origin port
instead of resulting package name picks the default
flavor of the port thus avoids depending on a specific
Python version.

Updates #33.

mail.yml

@@ -6,7 +6,7 @@
   tasks:
     - name: Install passlib
       ansible.builtin.package:
-        name: py39-passlib
+        name: security/py-passlib
         state: present
 
 - name: Deploy mail servers