Rescan all series via RescanSeriesCommand

src/NzbDrone.Core/MediaFiles/Commands/RescanSeriesCommand.cs

@@ -4,7 +4,7 @@ namespace NzbDrone.Core.MediaFiles.Commands
 {
     public class RescanSeriesCommand : Command
     {
-        public int SeriesId { get; set; }
+        public int? SeriesId { get; set; }
 
         public override bool SendUpdatesToClient
         {

src/NzbDrone.Core/MediaFiles/DiskScanService.cs

@@ -111,9 +111,21 @@ namespace NzbDrone.Core.MediaFiles
 
         public void Execute(RescanSeriesCommand message)
         {
-            var series = _seriesService.GetSeries(message.SeriesId);
+            if (message.SeriesId.HasValue)
+            {
+                var series = _seriesService.GetSeries(message.SeriesId.Value);
+                Scan(series);
+            }
 
-            Scan(series);
+            else
+            {
+                var allSeries = _seriesService.GetAllSeries();
+
+                foreach (var series in allSeries)
+                {
+                    Scan(series);
+                }
+            }
         }
     }
 }