Update: In Rebex HTTPS R5.7 and higher, you can override the Timeout value check by assigning the timeout value this way:
Rebex.Security.Cryptography.CryptoHelper.SetOption(request, "Timeout", timeout);
(Where request is an instance of HttpRequest.)
Oops, sorry for the inconvenience! It's not possible to override this, but we'll do something about it. In the meantime, if you need a hotfix build with this change disabled, please contact us at support@rebex.net!