This one's slice 8 is shorter than anything else we've seen before!
Also add support for a new slice type and noted possible values
for other data, including a possible lead on the CPAP mode.
Remarkably, this resulted in nearly no changes to the test output.
Only one session with 0 duration had its start/end times reset to 0,
since it will no longer get imported.
This has already exposed many limitations, and possibly some memory trampling. Before this will work as
a true regression test, we'll need to address both of those, so that this produces reliable, reproducible
output.
