message: readded slow hash function
diff: @@ -185,6 +185,13 @@ class Slice {
  return VELOCYPACK_HASH(start(), size, seed);
  }
  + // hashes the binary representation of a value, not using precalculated hash values
  + // this is mainly here for testing purposes
  + inline uint64_t hashSlow(uint64_t seed = defaultSeed) const {
  + size_t const size = checkOverflow(byteSize());
  + return VELOCYPACK_HASH(start(), size, seed);
  + }
  +
  // hashes the value, normalizing different representations of
  // arrays, objects and numbers. this function may produce different
  // hash values than the binary hash() function
  