timestampskew issue

[TeigeJDavidson]

Please check the Timestamp validation in the Checkstamp check

in the GetAuthorizationHeader why divide by 1000, since the value is supposed to be seconds?

    var normalizedTs = (ConvertToUnixTimestamp((ts.HasValue)
            ? ts.Value : DateTime.UtcNow)).ToString(); //removed / 1000

this causes issues in the CheckTimeStamp

    private static bool CheckTimestamp(string ts, int timestampSkewSec)
    {
        double parsedTs;
        if (double.TryParse(ts, out parsedTs))
        {
            var now = ConvertToUnixTimestamp(DateTime.Now);

            // Check timestamp staleness
            if (Math.Abs(parsedTs - now) > timestampSkewSec) //* 1000 
            {
                return false;
            }
            else
            {