Add missing seed criteria validation

src/NzbDrone.Core/Indexers/Gazelle/GazelleSettings.cs

@@ -11,6 +11,8 @@ namespace NzbDrone.Core.Indexers.Gazelle
             RuleFor(c => c.BaseUrl).ValidRootUrl();
             RuleFor(c => c.Username).NotEmpty();
             RuleFor(c => c.Password).NotEmpty();
+
+            RuleFor(c => c.SeedCriteria).SetValidator(_ => new SeedCriteriaSettingsValidator());
         }
     }
 

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

@@ -17,6 +17,8 @@ namespace NzbDrone.Core.Indexers.IPTorrents
             RuleFor(c => c.BaseUrl).Matches(@"(?:/|t\.)rss\?.+;download(?:;|$)")
                 .WithMessage("Use Direct Download Url (;download)")
                 .When(v => v.BaseUrl.IsNotNullOrWhiteSpace() && Regex.IsMatch(v.BaseUrl, @"(?:/|t\.)rss\?.+$"));
+
+            RuleFor(c => c.SeedCriteria).SetValidator(_ => new SeedCriteriaSettingsValidator());
         }
     }
 

src/NzbDrone.Core/Indexers/Nyaa/NyaaSettings.cs

@@ -10,6 +10,8 @@ namespace NzbDrone.Core.Indexers.Nyaa
         {
             RuleFor(c => c.BaseUrl).ValidRootUrl();
             RuleFor(c => c.AdditionalParameters).Matches("(&[a-z]+=[a-z0-9_]+)*", RegexOptions.IgnoreCase);
+
+            RuleFor(c => c.SeedCriteria).SetValidator(_ => new SeedCriteriaSettingsValidator());
         }
     }