fromHttpToGmtDate

fun String.fromHttpToGmtDate(): GMTDate

Convert valid http date String to GMTDate according to: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Date format: <day-name>{3}, {2} {3} {4} {2}:{2}:{2} GMT String size should be equals 29

Note that only date in GMT(UTC) is valid http date