Add possibility to enable pop3 protocol for Dovecot.

fix #17

installer.cfg

@@ -50,6 +50,9 @@ config_dir = /etc/dovecot
 user = vmail
 home_dir = /srv/vmail
 mailboxes_owner = vmail
+# Enable extra procotols (in addition to imap and lmtp)
+# Example: pop3
+extra_protocols =
 # Replace localhost with your domain
 postmaster_address = postmaster@localhost
 

modoboa_installer/scripts/dovecot.py

@@ -32,7 +32,10 @@ class Dovecot(base.Installer):
 
     def get_packages(self):
         """Additional packages."""
-        return self.packages + ["dovecot-{}".format(self.db_driver)]
+        packages = ["dovecot-{}".format(self.db_driver)]
+        if "pop3" in self.config.get("dovecot", "extra_protocols"):
+            packages += ["dovecot-pop3d"]
+        return self.packages + packages
 
     def install_packages(self):
         """Preconfigure Dovecot if needed."""