Add additional Failover API to IRedisFailover

Author: mythz

src/ServiceStack.Redis/IRedisFailover.cs

@@ -8,5 +8,7 @@ public interface IRedisFailover
         List<Action<IRedisClientsManager>> OnFailover { get; } 
 
         void FailoverTo(params string[] readWriteHosts);
+
+        void FailoverTo(IEnumerable<string> readWriteHosts, IEnumerable<string> readOnlyHosts);
     }
 }

src/ServiceStack.Redis/RedisManagerPool.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Threading;
 using ServiceStack.Caching;
 using ServiceStack.Logging;
@@ -103,6 +104,11 @@ public void FailoverTo(params string[] readWriteHosts)
             }
         }
 
+        public void FailoverTo(IEnumerable<string> readWriteHosts, IEnumerable<string> readOnlyHosts)
+        {
+            FailoverTo(readWriteHosts.ToArray()); //only use readWriteHosts
+        }
+
         /// <summary>
         /// Returns a Read/Write client (The default) using the hosts defined in ReadWriteHosts
         /// </summary>