We sometimes need to test what keys a client receives when specific keys
are pressed. This small helper simply runs in a terminal and receives raw
keyboard input and prints it to stdout with debugging information.
This can definitely be improved with the help of the TSM state-machine to
print more useful information and directly parse the input. However, this
is better than nothing.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
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