Add health check for dl clients removing completed downloads + enable for sab and qbit

(cherry picked from commit 7f2cd8a0e99b537a1c616998514bacdd8468a016)

Closes #2939

src/NzbDrone.Core/Download/Clients/QBittorrent/QBittorrent.cs

@@ -389,7 +389,8 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
             return new DownloadClientInfo
             {
                 IsLocalhost = Settings.Host == "127.0.0.1" || Settings.Host == "localhost",
-                OutputRootFolders = new List<OsPath> { _remotePathMappingService.RemapRemoteToLocal(Settings.Host, destDir) }
+                OutputRootFolders = new List<OsPath> { _remotePathMappingService.RemapRemoteToLocal(Settings.Host, destDir) },
+                RemovesCompletedDownloads = (config.MaxRatioEnabled || config.MaxSeedingTimeEnabled) && (config.MaxRatioAction == QBittorrentMaxRatioAction.Remove || config.MaxRatioAction == QBittorrentMaxRatioAction.DeleteFiles)
             };
         }
 

src/NzbDrone.Core/Download/Clients/Sabnzbd/Sabnzbd.cs

@@ -263,6 +263,8 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
                 status.OutputRootFolders = new List<OsPath> { _remotePathMappingService.RemapRemoteToLocal(Settings.Host, category.FullPath) };
             }
 
+            status.RemovesCompletedDownloads = config.Misc.history_retention != "0";
+
             return status;
         }
 

src/NzbDrone.Core/Download/Clients/Sabnzbd/SabnzbdCategory.cs

@@ -29,6 +29,7 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
         public string[] date_categories { get; set; }
         public bool enable_date_sorting { get; set; }
         public bool pre_check { get; set; }
+        public string history_retention { get; set; }
     }
 
     public class SabnzbdCategory

src/NzbDrone.Core/Download/DownloadClientInfo.cs

@@ -11,6 +11,7 @@ namespace NzbDrone.Core.Download
         }
 
         public bool IsLocalhost { get; set; }
+        public bool RemovesCompletedDownloads { get; set; }
         public List<OsPath> OutputRootFolders { get; set; }
     }
 }