message: Add bech prefix for regtest
diff: @@ -360,6 +360,8 @@ public:
  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
  +
  + bech32_hrp = "bcrt";
  }
  };
  