Revert "Correct null byte escaping"

This reverts commit f0c53dedef32642ed26c3602c2744bf64638755e.
Storage micro optimalizations
Fixed error if cache is empty

PHP Warning: Wrong parameter count for Redis::del() in vendor/kdyby/redis/src/Kdyby/Redis/RedisClient.php:336  @  CLI: www/index.php orm:generate:proxies
RedisClient::send - catch only RedisException
RedisClient: compatibility with phpredis
Panel: skip Closure argument
typos
RedisClient: deprecated constant WITH_SCORES
Lazy creation of Driver\PhpRedisDriver
Allow setting session handler as persistent
Simplified Cache::NAMESPACE_SEPARATOR sanitization