Reformat version in UpdateTip and other messages

Also remove the hardly-readable nBits from UpdateTip's log message.

src/main.cpp

@@ -2549,8 +2549,8 @@ void static UpdateTip(CBlockIndex *pindexNew) {
     nTimeBestReceived = GetTime();
     mempool.AddTransactionsUpdated(1);
 
-    LogPrintf("%s: new best=%s  height=%d bits=%d log2_work=%.8g  tx=%lu  date=%s progress=%f  cache=%.1fMiB(%utx)\n", __func__,
+    LogPrintf("%s: new best=%s height=%d version=0x%08x log2_work=%.8g tx=%lu date='%s' progress=%f cache=%.1fMiB(%utx)\n", __func__,
-      chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), chainActive.Tip()->nBits,
+      chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), chainActive.Tip()->nVersion,
       log(chainActive.Tip()->nChainWork.getdouble())/log(2.0), (unsigned long)chainActive.Tip()->nChainTx,
       DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()),
       Checkpoints::GuessVerificationProgress(chainParams.Checkpoints(), chainActive.Tip()), pcoinsTip->DynamicMemoryUsage() * (1.0 / (1<<20)), pcoinsTip->GetCacheSize());
@@ -3284,8 +3284,8 @@ bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& sta
     // Reject outdated version blocks when 95% (75% on testnet) of the network has upgraded:
     for (int32_t version = 2; version < 5; ++version) // check for version 2, 3 and 4 upgrades
         if (block.nVersion < version && IsSuperMajority(version, pindexPrev, consensusParams.nMajorityRejectBlockOutdated, consensusParams))
-            return state.Invalid(false, REJECT_OBSOLETE, strprintf("bad-version(v%d)", version - 1),
+            return state.Invalid(false, REJECT_OBSOLETE, strprintf("bad-version(0x%08x)", version - 1),
-                                 strprintf("rejected nVersion=%d block", version - 1));
+                                 strprintf("rejected nVersion=0x%08x block", version - 1));
 
     return true;
 }

src/primitives/block.cpp

@@ -18,7 +18,7 @@ uint256 CBlockHeader::GetHash() const
 std::string CBlock::ToString() const
 {
     std::stringstream s;
-    s << strprintf("CBlock(hash=%s, ver=%d, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%u)\n",
+    s << strprintf("CBlock(hash=%s, ver=0x%08x, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%u)\n",
         GetHash().ToString(),
         nVersion,
         hashPrevBlock.ToString(),