Fixed: Use HashSet to prevent duplicated indexer flags

src/NzbDrone.Core/Indexers/Definitions/FileList/FileListParser.cs

@@ -36,7 +36,7 @@ namespace NzbDrone.Core.Indexers.FileList
             {
                 var id = result.Id;
 
-                var flags = new List<IndexerFlag>();
+                var flags = new HashSet<IndexerFlag>();
 
                 if (result.Internal)
                 {

src/NzbDrone.Core/Indexers/Definitions/HDBits/HDBitsParser.cs

@@ -55,7 +55,7 @@ namespace NzbDrone.Core.Indexers.HDBits
                 var id = result.Id;
                 var internalRelease = result.TypeOrigin == 1 ? true : false;
 
-                var flags = new List<IndexerFlag>();
+                var flags = new HashSet<IndexerFlag>();
 
                 if (internalRelease)
                 {

src/NzbDrone.Core/Indexers/Definitions/PassThePopcorn/PassThePopcornParser.cs

@@ -72,7 +72,7 @@ namespace NzbDrone.Core.Indexers.PassThePopcorn
                     var id = torrent.Id;
                     var title = torrent.ReleaseName;
 
-                    var flags = new List<IndexerFlag>();
+                    var flags = new HashSet<IndexerFlag>();
 
                     if (torrent.GoldenPopcorn)
                     {

src/NzbDrone.Core/Indexers/Definitions/Torznab/TorznabRssParser.cs

@@ -229,15 +229,14 @@ namespace NzbDrone.Core.Indexers.Torznab
             return base.GetPeers(item);
         }
 
-        protected List<IndexerFlag> GetFlags(XElement item)
+        protected HashSet<IndexerFlag> GetFlags(XElement item)
         {
-            var flags = new List<IndexerFlag>();
+            var flags = new HashSet<IndexerFlag>();
 
             var downloadFactor = TryGetFloatTorznabAttribute(item, "downloadvolumefactor", 1);
-
             var uploadFactor = TryGetFloatTorznabAttribute(item, "uploadvolumefactor", 1);
 
-            if (uploadFactor == 2)
+            if (uploadFactor == 2.0)
             {
                 flags.Add(IndexerFlag.DoubleUpload);
             }

src/NzbDrone.Core/Parser/Model/ReleaseInfo.cs

@@ -10,7 +10,7 @@ namespace NzbDrone.Core.Parser.Model
     {
         public ReleaseInfo()
         {
-            IndexerFlags = new List<IndexerFlag>();
+            IndexerFlags = new HashSet<IndexerFlag>();
             Categories = new List<IndexerCategory>();
             Languages = new List<string>();
             Subs = new List<string>();
@@ -57,7 +57,7 @@ namespace NzbDrone.Core.Parser.Model
         public ICollection<string> Languages { get; set; }
         public ICollection<string> Subs { get; set; }
         public ICollection<IndexerCategory> Categories { get; set; }
-        public ICollection<IndexerFlag> IndexerFlags { get; set; }
+        public HashSet<IndexerFlag> IndexerFlags { get; set; }
 
         public int Age
         {