Authentication: cache plugins for auth and their settings in the auth_registry....
Authentication: cache plugins for auth and their settings in the auth_registry.
- Before that change on each requests 4x we loaded plugins for authentication, this hit
many caches, db invalidation context and loaded the plugins logic each time. This was a heavy performance hit
for SVN and other backends as they needed to load that plugins many many times
- Since Authentication plugins almost never change, we'll not store the plugins listed for authentication into
the authnregistry for each process
- For AuthPlugins settings we now also flush plugins settings, and authnregistry cached plugins