Support for multiple Redis databases

[LadyCailinBot]

CMDHELPER-2819 - Reported by CyaNox

Currently the redis persistance network seems to have no way of selecting any other database aside from the default one.

It would be nice is we could use multiple redis databases as per: http://redis.io/commands/select

[LadyCailinBot]

Comment by TerrorBite

I notice that the library in use, Jedis, has the ability to accept a URI of the form redis://host:port/dbnum to configure the connection - passing the URI from the config file directly to Jedis instead of using JedisShardInfo would be an easy way to add this support.