* Set nonblock on all accepted sockets. Not just ones for user code.
* Close an open websocket if another is accepted.
* Set debug level to INFO rather than DEBUG because DEBUG crashes
on ESP32-S3 USB OTG.
This makes it easier to blanket never reset flash and USB pins. It
also allows us to set a custom state after reset. The first case
is for the double tap reset that needs to be pulled low.
Fixes#5893
