Switch to using json encode/decode for serialization, may not round-trip 100% correctly but by design.
As this add-on is used to cache potentially untrusted data, serialize/unserialize are strongly not recommended.
Replace Doctrine Cache key mangling. The practice of injecting [ and ] into key names makes working with redis-cli annoying (most linux shells require [ or ] to be escaped in a confusing list of situations), and requires further escaping when using Redis KEYS or SCAN commands.
