Speed up the progress by further restricting progress bar display freq.
Speed up the progress by further restricting progress bar display freq.

The whole progress bar gets refreshed only in steps of the $advance var.
Remove the $percent variable from show_progress(). Display a percent
value if the $max variable is >= 0, because that is when we can compute
a percent. Also remove the -p option that controled the display of the
percentage (but weirdly).

levaidaniel/sbo_updates