Fix integer overflow in hashsize calculation.
Fix integer overflow in hashsize calculation.

Remove use of confusing ub4 type in hashsize calculation, which actually needs to be greater than 4 byte.

Remove unused ub4 and ub1 typedefs.

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