The former `scan` command only worked with a single 1-wire device attached.
However, the 1-wire bus is ment as a bus, so there might be several devices
connected to the bus. In that case, there is a suggested bus scanning scheme
(cf. https://www.maximintegrated.com/en/design/technical-documents/app-notes/1/187.html)
that makes clever use of pull-down collisions that will occur in such a
situation. This allows to scan for all devices by basically doing a tree
search. (The algorithm avoids recursion by using a few house-keeping variables
to keep search state while discovering all devices ROM addresses.)

The file was given to `astyle -t --style=linux --lineend=linux hydrabus_mode_onewire.c`.
However, the crc constants array was left untouched to keep the commas aligned.