WebRequest hard timeout

[cdalexndr]

Currently, setting timeout is unreliable, the whole request time could exceed the set timeout (connect, redirects, etc all using same timeout value).

A method for setting hard request timeout should be provided, so that a request can be reliably terminated in a timeout window.

Example implementation: https://www.baeldung.com/httpclient-timeout#hard_timeout
Note that the above implementation example is for a single request. Each redirect request will reduce the available timeout for that request so that all requests are completed/terminated in the set timeout.

P.S.: after this feature, the original timeout value could be split into connection and socket timeouts to reflect actual usage.