message: fix max op_return relay size
diff: @@ -28,10 +28,10 @@ public:
  };
  /**
  - * Default setting for nMaxDatacarrierBytes. 80 bytes of data, +1 for OP_RETURN,
  + * Default setting for nMaxDatacarrierBytes. 256 bytes of data, +1 for OP_RETURN,
  * +2 for the pushdata opcodes.
  */
  -static const unsigned int MAX_OP_RETURN_RELAY = 83;
  +static const unsigned int MAX_OP_RETURN_RELAY = 259;
  /**
  * A data carrying output is an unspendable output containing data. The script
  