Fixed: Update AppIndexerRegex to support indexer ids over 100

Fixed Update AppIndexerRegex to support /api trailing (Mylar3)

src/NzbDrone.Core/Applications/ApplicationBase.cs

@@ -14,7 +14,7 @@ namespace NzbDrone.Core.Applications
         protected readonly IAppIndexerMapService _appIndexerMapService;
         protected readonly Logger _logger;
 
-        protected static readonly Regex AppIndexerRegex = new Regex(@"\/(?<indexer>\d.)\/?$",
+        protected static readonly Regex AppIndexerRegex = new Regex(@"\/(?<indexer>\d{1,3})(?:\/(?:api)?\/?)?$",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         public abstract string Name { get; }