Add configs for creating the admin room and granting first user.

Signed-off-by: Jason Volk <jason@zemos.net>

tuwunel-example.toml

@@ -1450,6 +1450,19 @@
 #
 #admin_room_tag = "m.server_notice"
 
+# Whether to grant the first user to register admin privileges by joining
+# them to the admin room. Note that technically the next user to register
+# when the admin room is empty (or only contains the server-user) is
+# granted, and only when the admin room is enabled.
+#
+#grant_admin_to_first_user = true
+
+# Whether the admin room is created on first startup. Users should not set
+# this to false. Developers can set this to false during integration tests
+# to reduce activity and output.
+#
+#create_admin_room = true
+
 # Sentry.io crash/panic reporting, performance monitoring/metrics, etc.
 # This is NOT enabled by default. tuwunel's default Sentry reporting
 # endpoint domain is `o4509498990067712.ingest.us.sentry.io`.