In the log I see things like:

    2017-09-13 03:54:33 init message: Rescanning...
    2017-09-13 03:54:33 Rescanning last 68616 blocks (from block 416339)...
    2017-09-13 03:54:40 AddToWallet xxxxx  update
    2017-09-13 03:55:33 Still rescanning. At block 418849. Progress=0.549138

I would be interested to see the wallet file name on each of these log lines.

Would there be any interest in merging such a PR?
wss.fAnyUnordered = true;
            pwallet->LoadToWallet(wtx);
        }
        else if (strType == "acentry")
        {
            std::string strAccount;
            ssKey >> strAccount;
            uint64_t nNumber;
            ssKey >> nNumber;
            if (nNumber > pwallet->nAccountingEntryNumber) {
                pwallet->nAccountingEntryNumber = nNumber;
            }
            if (!wss.fAnyUnordered)
            {
                CAccountingEntry acentry;
                ssValue >> acentry;
                if (acentry.nOrderPos == -1)
                    wss.fAnyUnordered = true;
            }
        }
        else if (strType == "watchs")
        {
            wss.nWatchKeys++;
            CScript script;
            ssKey >> script;
            char fYes;
            ssValue >> fYes;
            if (fYes == '1')
                pwallet->LoadWatchOnly(script);
        }