Endpoint: Add support for unix sockets

[jlledom]

This PR adds a helper in Enpoint to connect to Redis through a unix socket. The implementation supports receiving options like credentials. I tested the connection to an ACL protected server through a Unix socket and it works fine for me.

This is the script I used to test the branch locally:

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  #gem 'async-redis'
  gem 'async-redis', git: 'https://github.com/jlledom/async-redis', branch: 'jlledom-unix-endpoint'
end

def main
  Async do
    path= '/path/to/acl-redis-master.sock'
    credentials = %w[user passW0rd]
    endpoint = Async::Redis::Endpoint.unix(path, credentials:)
    client = Async::Redis::Client.new(endpoint)

    while true
      begin
        sleep 1
        result = client.ping 'test'
        puts result
      rescue StandardError => e
        puts e.message
        retry
      end
    end
  end
end

main

Types of Changes

• New feature.

Contribution

• I added tests for my changes.
• I tested my changes locally.
• I agree to the Developer's Certificate of Origin 1.1.