Revert "merge acl-mongodbBackend.d.ts and acl-redisBackend.d.ts into acl.d.ts"

This reverts commit 5fad551b59.

acl/acl-redisBackend.d.ts

@@ -0,0 +1,21 @@
+// Type definitions for node_acl 0.4.7
+// Project: https://github.com/optimalbits/node_acl
+// Definitions by: Qubo <https://github.com/tkQubo>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="acl.d.ts" />
+/// <reference path='../redis/redis.d.ts'/>
+
+declare module "acl" {
+  import redis = require('redis');
+
+  interface AclStatic {
+    redisBackend: RedisBackendStatic;
+  }
+
+  interface RedisBackend extends Backend<redis.RedisClient> { }
+  interface RedisBackendStatic {
+    new(redis: redis.RedisClient, prefix: string): RedisBackend;
+    new(redis: redis.RedisClient): RedisBackend;
+  }
+}