Add disable encryption option for cache file name

Sources/Cache/DiskStorage.swift

@@ -196,11 +196,18 @@ public enum DiskStorage {
         }
 
         func cacheFileName(forKey key: String) -> String {
-            let hashedKey = key.kf.md5
-            if let ext = config.pathExtension {
-                return "\(hashedKey).\(ext)"
+            if self.config.useEncryptionForCacheFileName {
+                let hashedKey = key.kf.md5
+                if let ext = config.pathExtension {
+                    return "\(hashedKey).\(ext)"
+                }
+                return hashedKey
+            } else {
+                if let ext = config.pathExtension {
+                    return "\(key).\(ext)"
+                }
+                return key
             }
-            return hashedKey
         }
 
         func allFileURLs(for propertyKeys: [URLResourceKey]) throws -> [URL] {
@@ -310,6 +317,9 @@ extension DiskStorage {
         /// Default is `nil`, means that the cache file does not contain a file extension.
         public var pathExtension: String? = nil
 
+        /// Default is `true`, means that md5 encryption will be used for creation the cache file name.
+        public var useEncryptionForCacheFileName: Bool = true
+
         let name: String
         let fileManager: FileManager
         let directory: URL?