message: Allow to skip malleability check when deserializing BLS primitives
  Useful when many sigs need to be deserialized and at the same time the hash
  of these is never used.
diff: @@ -165,14 +165,16 @@ public:
  // }
  }
  template <typename Stream>
  - inline void Unserialize(Stream& s)
  + inline void Unserialize(Stream& s, bool checkMalleable = true)
  {
  char buf[SerSize];
  s.read((char*)buf, SerSize);
  SetBuf(buf, SerSize);
  + if (checkMalleable) {
  CheckMalleable(buf, SerSize);
  }
  + }
  inline void CheckMalleable(void* buf, size_t size) const
  {
  