If there are open requests, the http server waits up to 60 seconds.
However, some requests (such as the Reboot button) seems to keep a
connection open and needlessly slow down the reboot process:
```
Jan 11 00:52:54 homeassistant eb034fca9c7d[404]: 2021-01-11 00:52:54 DEBUG (MainThread) [homeassistant.core] Bus:Handling <Event homeassistant_stop[L]>
Jan 11 00:52:54 homeassistant eb034fca9c7d[404]: 2021-01-11 00:52:54 DEBUG (MainThread) [homeassistant.helpers.restore_state] Dumping states 111
Jan 11 00:52:54 homeassistant eb034fca9c7d[404]: 2021-01-11 00:52:54 DEBUG (MainThread) [homeassistant.helpers.restore_state] Dumping states
Jan 11 00:52:54 homeassistant eb034fca9c7d[404]: 2021-01-11 00:52:54 INFO (MainThread) [homeassistant.components.websocket_api.http.connection] [281473359593728] Connection closed by client
Jan 11 00:52:56 homeassistant eb034fca9c7d[404]: 2021-01-11 00:52:56 DEBUG (MainThread) [homeassistant.components.websocket_api.http.connection] [281473359593728] Disconnected
Jan 11 00:53:54 homeassistant eb034fca9c7d[404]: 2021-01-11 00:53:54 DEBUG (MainThread) [homeassistant.core] Waited 60 seconds for task: <Task pending name='Task-585' coro=<async_setup.<locals>.stop_server() running at /usr/src/homeassistant/homeassistant/components/http/__init__.py:228> wait_for=<_GatheringFuture pending cb=[<TaskWakeupMethWrapper object at 0xffff9f112f70>()]> cb=[_wait.<locals>._on_completion() at /usr/local/lib/python3.8/asyncio/tasks.py:518]>
...
```
Ruslan Sayfutdinov
Ville Skyttä
Franck Nijhof
Marc Mueller
Stefan Agner