Warn about Support Sentinel with TLS (II) #2403 (#2492)

Author: sazzad16

src/main/java/redis/clients/jedis/JedisSentinelPool.java

@@ -42,6 +42,9 @@ public class JedisSentinelPool extends JedisPoolAbstract {
 
   private final JedisClientConfig sentinelClientConfig;
 
+  /**
+   * WARNING: This variable will be changed to {@link java.util.Collection} in upcoming major release.
+   */
   protected final Set<MasterListener> masterListeners = new HashSet<>();
 
   private volatile HostAndPort currentHostMaster;