pacconf: fix usage detection
pacconf: fix usage detection

USAGE_ALL is the combination of all individual flags.  Testing for it
with bitwise-and returns true if any flags are enabled.

Signed-off-by: Andrew Gregory <13115e38efea9b5bf08524f6765f5bb44291d47f@gmail.com>

andrewgregory/pacutils,andrewgregory/pacutils