shuffle cdn shard configs to allow for multiple file shards to handle one file, randomly distributing

MareSynchronosServer/MareSynchronosServer/Hubs/MareHub.Files.cs

@@ -59,6 +59,7 @@ public partial class MareHub
         {
             var forbiddenFile = forbiddenFiles.SingleOrDefault(f => string.Equals(f.Hash, file.Hash, StringComparison.OrdinalIgnoreCase));
 
+            shardConfig.Shuffle();
             var matchedShardConfig = shardConfig.Find(f => f.FileMatchRegex.Match(file.Hash).Success);
             var baseUrl = matchedShardConfig?.CdnFullUrl ?? _mainCdnFullUrl;