message: Update runtime error message when block size is exceeded
  When a graphene block is deserialized we do a check based on number
  of transactions in a block to determine whether the block would
  exceed the max block size before continuing to re-assemble the block
  or make any further needed re-requests for missing transactions.
diff: @@ -171,7 +171,11 @@ public:
  // transactions and the downside for pathological blocks is just that graphene won't work so we fall back
  // to xthin
  if (nBlockTxs > (thinrelay.GetMaxAllowedBlockSize() / MIN_TX_SIZE))
  - throw std::runtime_error("nBlockTxs exceeds threshold for excessive block txs");
  + {
  + throw std::runtime_error(strprintf(
  + "Based on number of transactions:(%d) the threshold for max allowed blocksize:(%d) will be exceeded",
  + nBlockTxs, thinrelay.GetMaxAllowedBlockSize()));
  + }
  if (!pGrapheneSet)
  {
  if (version > 3)
  