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?
nKeys = nCKeys = nWatchKeys = nKeyMeta = m_unknown_records = 0;
        fIsEncrypted = false;
        fAnyUnordered = false;
        nFileVersion = 0;
    }
};
static bool
ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
             CWalletScanState &wss, std::string& strType, std::string& strErr) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
{
    try {
        
        
        
        ssKey >> strType;
        if (strType == "name")
        {
            std::string strAddress;
            ssKey >> strAddress;
            ssValue >> pwallet->mapAddressBook[DecodeDestination(strAddress)].name;
        }
        else if (strType == "purpose")
        {
            std::string strAddress;
            ssKey >> strAddress;
            ssValue >> pwallet->mapAddressBook[DecodeDestination(strAddress)].purpose;