title: Unslave a redis slave
body: <p>I have a setup of 3 instances in a failover cluster, one master and two slaves. All monitored by sentinels. At one point I decide I don't need one slave, and I want to reuse that redis instance for something else, what commands to I issue?
  I tried running <code>slaveof no one</code> on that slave, but it's enslaved again in a few seconds.</p>