Move cache and session store to Redis
This MR moves two components to Redis.
- Caching — before, we were relying on memcached for caching. This is unnecessary, because we alrady mandate Redis as message broker, and Redis is as performant as memcached for caching as well.
- Sessions — as we mandate Redis anyway, storing sessions there is possible as well. This is the last missing piece to support horizontal scaling of AlekSIS.
Edited by Nik | Klampfradler