Fan curve improvement, and slight interface changes (meant to live update the threshold temperatures).
The -l option will enable loop mode (look at the readme for default parameters)
while the --update option lets the user specify the temperature thresholds (via a sequence of 6 integers), eg,
./dellfan -l -ut 45 50 55 60 70 80
has the same behavior as ./delfan -l, which has more or less the same behavior as something like ./dellfan_old -l 50 55 65 80 with the old version.