Clone http request for ws transport

[Totodore]

Motivation

Before http 1.0 the Parts struct was not clonable because extensions were not. Because it is now possible, we can now clone the whole Parts sruct rather than rebuilding it for the ws transport.
Therefore it is now possible to retrieve Extensions related to the initialized request.

Solution

Use parts.clone() rather than rebuilding an entire Request struct and ommitting the extensions field.

[tausifcreates]

This is revolutionary!