timedrun: proper signal handler initialization.
timedrun: proper signal handler initialization.

also print basic usage when forgetting arguments.

dormando/memcached,memcached/memcached,dormando/memcached,dormando/memcached,memcached/memcached,memcached/memcached,dormando/memcached,dormando/memcached,memcached/memcached,memcached/memcached