Set Redis read_timout earlier

[dzuelke]

The read_timeout parameter is currently, correctly, set using setOption() in PhpRedisConnector::createClient() after the connection was created.

The additional sixth argument to connect() was added in ext-redis/3.1.3 (phpredis/phpredis@b56dc4), so older versions won't have it.

However, it might make sense to detect the redis extension version (using phpversion("redis")) and pass the option to the connect() method if possible, as otherwise, the authentication and database selection steps are not subject to the read timeout.

If not, then maybe there should be a comment to explain why it's done this way, to prevent some future "improvement" that moves it to the argument without a version check ;)

Alternatively, just pass the argument to connect() if it's configured in Laravel and skip it otherwise; judging from the ext-redis commits and changelog entry, the read timeout option was broken before 3.1.3 anyway.

[tillkruss]

Could you submit a PR, or shall I?