Update proxied nginx for maubot

- Don't put unnecessary Host header.
- Update both cases (with or without nginx proxy)

roles/matrix-bot-maubot/tasks/init.yml

@@ -14,14 +14,13 @@
           {% if matrix_nginx_proxy_enabled | default(False) %}
             {# Use the embedded DNS resolver in Docker containers to discover the service #}
              resolver 127.0.0.11 valid=5s;
-             set $backend "matrix-bot-maubot:{{ matrix_bot_maubot_management_interface_port }}$request_uri";
-             proxy_pass http://$backend;
-             proxy_set_header Host $host;
+             set $backend "matrix-bot-maubot:{{ matrix_bot_maubot_management_interface_port }};
+             proxy_pass http://$backend$request_uri";
              proxy_set_header Upgrade $http_upgrade;
              proxy_set_header Connection "upgrade";
           {% else %}
             {# Generic configuration for use outside of our container setup #}
-            proxy_pass http://127.0.0.1:{{ matrix_bot_maubot_management_interface_port }}/$1;
+            proxy_pass http://127.0.0.1:{{ matrix_bot_maubot_management_interface_port }}$request_uri";
             proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection "upgrade";
           {% endif %}