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?
}
        else if (strType == "keymeta")
        {
            CPubKey vchPubKey;
            ssKey >> vchPubKey;
            CKeyMetadata keyMeta;
            ssValue >> keyMeta;
            wss.nKeyMeta++;
            pwallet->LoadKeyMetadata(vchPubKey.GetID(), keyMeta);
        }
        else if (strType == "watchmeta")
        {
            CScript script;
            ssKey >> script;
            CKeyMetadata keyMeta;
            ssValue >> keyMeta;
            wss.nKeyMeta++;
            pwallet->LoadScriptMetadata(CScriptID(script), keyMeta);
        }
        else if (strType == "defaultkey")
        {
            
            
            CPubKey vchPubKey;
            ssValue >> vchPubKey;
            if (!vchPubKey.IsValid()) {
                strErr = "Error reading wallet database: Default Key corrupt";
                return false;
            }
        }