Implement per-route options in gorouter

[maxmoehl]

Proposed Change

As a user,
I want to control how the routing stack talks to my app,
so that I can better align the traffic to the needs of my application.

In RFC0027 Generic Per-Route Features we decided to implement a new field for nats messages which can contain additional, custom configuration for a route. Together with this new feature we also want to implement the first property making use of it: customisable load balancing algorithms.

Acceptance criteria

• gorouter is able to parse the new field containing the per-route options
• gorouter adjusts the load balancing algorithm for routes that provide the field

Related links

No response

[Dariquest]

Corresponding PR cloudfoundry/gorouter#428