Treat coinbase value violation as DoS

src/main.cpp

@@ -1668,7 +1668,7 @@ bool CBlock::ConnectBlock(CValidationState &state, CBlockIndex* pindex, CCoinsVi
         printf("- Connect %u transactions: %.2fms (%.3fms/tx, %.3fms/txin)\n", (unsigned)vtx.size(), 0.001 * nTime, 0.001 * nTime / vtx.size(), nInputs <= 1 ? 0 : 0.001 * nTime / (nInputs-1));
 
     if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
-        return state.Invalid(error("ConnectBlock() : coinbase pays too much (actual=%"PRI64d" vs limit=%"PRI64d")", vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees)));
+        return state.DoS(100, error("ConnectBlock() : coinbase pays too much (actual=%"PRI64d" vs limit=%"PRI64d")", vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees)));
 
     if (!control.Wait())
         return state.DoS(100, false);