Support to connect to Redis via unix domain sockets?

[Fijxu]

It is possible to add support for Unix Domain sockets to connect to a Redis compatible DB? You should probably already know that UDS always has better performance than TCP.

The https://github.com/stefanwille/crystal-redis lib seemed to support it: https://github.com/stefanwille/crystal-redis/blob/5fc089cc4f73f08eb42170cb82e30205369a18ad/src/redis.cr#L85

[jgaskins]

There's been a PR open for it for a few years, actually. #4

I kept meaning to get back to it and try it out, but it's been so long since I've worked with Unix domain sockets (15-20 years?) that I'm out of my depth there. I simply never run things in a way that guarantees they'll coexist on a single box anymore. It seems like it should just work, but I don't know how to verify that.

[Fijxu]

That PR should work fine, I'll try it myself later. Thanks