Add matrix_playbook_reverse_proxy_type variable which influences all other services

roles/custom/matrix-dendrite/defaults/main.yml

@@ -84,7 +84,7 @@ matrix_dendrite_max_file_size_bytes: 10485760
 
 # Controls which HTTP header (e.g. 'X-Forwarded-For', 'X-Real-IP') to inspect to find the real remote IP address of the client.
 # This is likely required if Dendrite is running behind a reverse proxy server.
-matrix_dendrite_sync_api_real_ip_header: ''
+matrix_dendrite_sync_api_real_ip_header: 'X-Forwarded-For'
 
 # The tmpfs at /tmp needs to be large enough to handle multiple concurrent file uploads.
 matrix_dendrite_tmp_directory_size_mb: 500