add a way to configure the `proxy_cache_*` [1] directive for external-auth.
The user-defined cache_key may contain sensitive information
(e.g. Authorization header).
We want to store *only* a hash of that key, not the key itself on disk.
[1] http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_key
Signed-off-by: Moritz Johner <beller.moritz@googlemail.com>
* Use information about the configuration configmap to determine changes
* Add hashstructure dependency
* Rename queue functions
* Add test for configmap checksum
worker_cpu_affinity is a common optimization method for improving nginx performance, adding this as a custom configuration. Also fix some format issues found during editing.
