Fixed: (IPTorrents) Allow UA override for CF

Fixes #842
Fixes #809

src/NzbDrone.Core/Indexers/Definitions/IPTorrents.cs

@@ -200,6 +200,8 @@ namespace NzbDrone.Core.Indexers.Definitions
 
             var request = new IndexerRequest(searchUrl, HttpAccept.Html);
 
+            request.HttpRequest.Headers.UserAgent = Settings.UserAgent;
+
             yield return request;
         }
 
@@ -349,13 +351,32 @@ namespace NzbDrone.Core.Indexers.Definitions
         public Action<IDictionary<string, string>, DateTime?> CookiesUpdater { get; set; }
     }
 
+    public class IPTorrentsSettingsValidator : AbstractValidator<IPTorrentsSettings>
+    {
+        public IPTorrentsSettingsValidator()
+        {
+            RuleFor(c => c.UserAgent).NotEmpty();
+            RuleFor(c => c.Cookie).NotEmpty();
+        }
+    }
+
     public class IPTorrentsSettings : CookieTorrentBaseSettings
     {
         public IPTorrentsSettings()
         {
         }
 
+        private static readonly IPTorrentsSettingsValidator Validator = new IPTorrentsSettingsValidator();
+
+        [FieldDefinition(2, Label = "Cookie User-Agent", Type = FieldType.Textbox, HelpText = "User-Agent associated with cookie used from Browser")]
+        public string UserAgent { get; set; }
+
         [FieldDefinition(3, Label = "FreeLeech Only", Type = FieldType.Checkbox, Advanced = true, HelpText = "Search Freeleech torrents only")]
         public bool FreeLeechOnly { get; set; }
+
+        public override NzbDroneValidationResult Validate()
+        {
+            return new NzbDroneValidationResult(Validator.Validate(this));
+        }
     }
 }

src/NzbDrone.Core/Indexers/Settings/CookieTorrentBaseSettings.cs

@@ -33,7 +33,7 @@ namespace NzbDrone.Core.Indexers.Settings
         [FieldDefinition(4)]
         public IndexerTorrentBaseSettings TorrentBaseSettings { get; set; } = new IndexerTorrentBaseSettings();
 
-        public NzbDroneValidationResult Validate()
+        public virtual NzbDroneValidationResult Validate()
         {
             return new NzbDroneValidationResult(Validator.Validate(this));
         }