"EEE,dd-MMM-yyyy HH:mm:ss z",
    "EEE, dd-MM-yyyy HH:mm:ss z",
    // RI bug 6641315 claims a cookie of this format was once served by www.yahoo.com:
    "EEE MMM d yyyy HH:mm:ss z",
  )

private val BROWSER_COMPATIBLE_DATE_FORMATS =
  arrayOfNulls<DateFormat>(BROWSER_COMPATIBLE_DATE_FORMAT_STRINGS.size)

/** Returns the date for this string, or null if the value couldn't be parsed. */
fun String.toHttpDateOrNull(): Date? {