This patch documents the new interpretation of stop_arg when stop_src ==
TRIG_NONE. In the new interpretation, if stop_src==TRIG_NONE, a user may
specify that a buffer of finite length (and less than or equal to the
maximum buffer size) be repeated indefinitely.
For now, only the NI MIO driver implements this new interpretation. All
other drivers should continue to force stop_arg==0 when
stop_src==TRIG_NONE. In this case, the old behavior is maintained.
Add extra detail to the section on acquisition functions about the
range and aref parameters, and describe the comedi_range type.
The whole section is still a bit higgledy-piggledy and could do with
some rearrangement one day!
Mention that the stuff that relies on the COMEDI_TRIG ioctl, including
the slowly varying input (comedi_sv_...) functions no longer work with
current versions of the Comedi kernel layer.
The PDF output of the table of configurations was awful. Fiddled with
the column widths a bit and simplified the layout "Meanings of data[1],..."
column to allow it to wrap.
