* WIP: start with aud verification
* adjust rest test for token's site_id remark42
* add tests for non-matching aud
* fix auth hook test with updates limiter
* check siteID with enabled call for static store
* fix site enabled check
* remove cache, switch to go-pkgz/rest/cache
* remove mongo cache from server test
* remove old caching code
* test tricky disqus inputs
* fix migrator test
* stacktrace dump test
* add keyStore and switch all secret usage to this store
- implement static ks
- add shared secret
* lint: shadow in jwt and missing comment
* rename static key group to shared and use top-level shared secret
* move siteID extraction (from token) to internal func
* lint: merge var and assign for key test