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

Tests:

- Config files are all symlinks in /etc/
- Creating blog and wiki works
- Wiki is accessible

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

debian/freedombox.maintscript

@@ -109,3 +109,6 @@ rm_conffile /etc/gitweb-freedombox.conf 23.10~
 rm_conffile /etc/apache2/conf-available/gitweb-freedombox.conf 23.10~
 rm_conffile /etc/apache2/conf-available/gitweb-freedombox-auth.conf 23.10~
 rm_conffile /etc/apache2/conf-available/i2p-freedombox.conf 23.10~
+rm_conffile /etc/ikiwiki/plinth-blog.setup 23.10~
+rm_conffile /etc/ikiwiki/plinth-wiki.setup 23.10~
+rm_conffile /etc/apache2/conf-available/ikiwiki-plinth.conf 23.10~

plinth/modules/ikiwiki/__init__.py

@@ -6,6 +6,7 @@ from django.utils.translation import gettext_lazy as _
 
 from plinth import app as app_module
 from plinth import cfg, frontpage, menu
+from plinth.config import DropinConfigs
 from plinth.modules.apache.components import Webserver
 from plinth.modules.backups.components import BackupRestore
 from plinth.modules.firewall.components import Firewall
@@ -34,7 +35,7 @@ class IkiwikiApp(app_module.App):
 
     app_id = 'ikiwiki'
 
-    _version = 1
+    _version = 2
 
     def __init__(self):
         """Create components for the app."""
@@ -61,6 +62,13 @@ class IkiwikiApp(app_module.App):
         ])
         self.add(packages)
 
+        dropin_configs = DropinConfigs('dropin-configs-ikiwiki', [
+            '/etc/ikiwiki/plinth-blog.setup',
+            '/etc/ikiwiki/plinth-wiki.setup',
+            '/etc/apache2/conf-available/ikiwiki-plinth.conf',
+        ])
+        self.add(dropin_configs)
+
         firewall = Firewall('firewall-ikiwiki', info.name,
                             ports=['http', 'https'], is_external=True)
         self.add(firewall)