Merge pull request #508 from deeringc/patch-1

Adding 308 "Permanent Redirect" to http_constants.dat

Author: ras0219-msft

Release/include/cpprest/details/http_constants.dat

@@ -28,6 +28,7 @@ DAT(SeeOther,              303, _XPLATSTR("See Other"))
 DAT(NotModified,           304, _XPLATSTR("Not Modified"))
 DAT(UseProxy,              305, _XPLATSTR("Use Proxy"))
 DAT(TemporaryRedirect,     307, _XPLATSTR("Temporary Redirect"))
+DAT(PermanentRedirect,     308, _XPLATSTR("Permanent Redirect"))
 DAT(BadRequest,            400, _XPLATSTR("Bad Request"))
 DAT(Unauthorized,          401, _XPLATSTR("Unauthorized"))
 DAT(PaymentRequired,       402, _XPLATSTR("Payment Required"))