PARALLEL=9 make test -> runs prove in parallel
PARALLEL=9 make test -> runs prove in parallel

would prefer to pass/reuse make's -j down to prove, but don't want to spend
the time on it.

makes tests run in ~30s instead of several minutes. can use a fair amount of
RAM so be wary with automated builders.

memcached/memcached,guikcd/memcached,gencer/memcached,guikcd/memcached,gencer/memcached,guikcd/memcached,gencer/memcached,memcached/memcached,memcached/memcached,dormando/memcached,memcached/memcached,gencer/memcached,dormando/memcached,gencer/memcached,dormando/memcached,guikcd/memcached,memcached/memcached,dormando/memcached,dormando/memcached,guikcd/memcached