matrixsynapse: Use drop-in config component for /etc files

Tests:

- Config files are all symlinks in /etc/
- Login to Matrix using app.element.io works.
- Fail2ban rules work

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

debian/freedombox.maintscript

@@ -114,3 +114,6 @@ rm_conffile /etc/ikiwiki/plinth-wiki.setup 23.10~
 rm_conffile /etc/apache2/conf-available/ikiwiki-plinth.conf 23.10~
 rm_conffile /etc/apache2/conf-available/janus-freedombox.conf 23.10~
 rm_conffile /etc/letsencrypt/renewal-hooks/deploy/50-freedombox 23.10~
+rm_conffile /etc/apache2/conf-available/matrix-synapse-plinth.conf 23.10~
+rm_conffile /etc/fail2ban/jail.d/matrix-auth-freedombox.conf 23.10~
+rm_conffile /etc/fail2ban/filter.d/matrix-auth-freedombox.conf 23.10~

plinth/modules/matrixsynapse/__init__.py

@@ -11,6 +11,7 @@ from ruamel.yaml.util import load_yaml_guess_indent
 
 from plinth import app as app_module
 from plinth import frontpage, menu
+from plinth.config import DropinConfigs
 from plinth.daemon import Daemon
 from plinth.modules.apache.components import Webserver
 from plinth.modules.backups.components import BackupRestore
@@ -44,7 +45,7 @@ class MatrixSynapseApp(app_module.App):
 
     app_id = 'matrixsynapse'
 
-    _version = 8
+    _version = 9
 
     def __init__(self):
         """Create components for the app."""
@@ -77,6 +78,13 @@ class MatrixSynapseApp(app_module.App):
             ['matrix-synapse', 'matrix-synapse-ldap3', 'python3-psycopg2'])
         self.add(packages)
 
+        dropin_configs = DropinConfigs('dropin-configs-matrixsynapse', [
+            '/etc/apache2/conf-available/matrix-synapse-plinth.conf',
+            '/etc/fail2ban/jail.d/matrix-auth-freedombox.conf',
+            '/etc/fail2ban/filter.d/matrix-auth-freedombox.conf',
+        ])
+        self.add(dropin_configs)
+
         firewall = Firewall('firewall-matrixsynapse', info.name,
                             ports=['matrix-synapse-plinth'], is_external=True)
         self.add(firewall)