- Fixed major problem with prefix aggregation on 32-bit machines: ip2long() produces negative values on 32-bit machines for addresses over 127.255.255.255
  because PHP uses signed integers by default which messes up things badly. Workaround involves using sprintf('%u',...) to convert signed into unsigned
  integers and converting these to float in some calculations. To avoid this overhead on 64-bit machines, prefix_aggregator() has been forked into 32-bit
  and 64-bit versions, invoked when frontend aggregator function detects 4 or 8 octets integer size, respectively.