Add support for bridge self signing

This also moves msc4190 to the correct section for twitter

roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml

@@ -40,6 +40,7 @@ matrix_mautrix_gmessages_homeserver_domain: "{{ matrix_domain }}"
 matrix_mautrix_gmessages_appservice_address: "http://matrix-mautrix-gmessages:8080"
 
 matrix_mautrix_gmessages_msc4190_enabled: "{{ matrix_bridges_msc4190_enabled }}"
+matrix_mautrix_gmessages_self_sign_enabled: "{{ matrix_bridges_self_sign_enabled }}"
 
 matrix_mautrix_gmessages_backfill_enabled: true
 matrix_mautrix_gmessages_backfill_max_initial_messages: 50

roles/custom/matrix-bridge-mautrix-gmessages/templates/config.yaml.j2

@@ -356,6 +356,9 @@ encryption:
     # Only relevant when using end-to-bridge encryption, required when using encryption with next-gen auth (MSC3861).
     # Changing this option requires updating the appservice registration file.
     msc4190: {{ matrix_mautrix_gmessages_msc4190_enabled | to_json }}
+    # Whether to enable self-signing for bridges (Only the bridge bot uses this for now)
+    # Requires msc4190 to replace keys on reset
+    self_sign: {{ matrix_mautrix_gmessages_self_sign_enabled | to_json }}
     # Enable key sharing? If enabled, key requests for rooms where users are in will be fulfilled.
     # You must use a client that supports requesting keys from other users to use this feature.
     allow_key_sharing: {{ matrix_mautrix_gmessages_bridge_encryption_key_sharing_allow | to_json }}