Rework stat2ascii into a printing function that allows to add more data
with a risk of overflowing a static buffer.
In the sesutil map command add extra informations:
- Thermal sensor temperature
- Cooling devices speed
- Voltage sensors, current consumption
I think that the rounding should be performed here, right after the KASSERT()s and before the sanity check on the number of free pages. The reason being that in the worst case vm_page_reclaim_run() will perform the rounded up number of page allocations before it frees any of the pages from the contiguous run.