Euan Kemp b443573945 [Rust] Implement minimal auth support (#7338)
* [Rust] Implement minimal auth support

This is pretty much the bare minimum needed to get v2 auth working.

This is partly based on the Go implementation.

* [Rust] properly format query string

* [Rust] Improve auth formatting

* [Rust] Regenerate petstore sample
2018-04-02 14:58:26 +08:00
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