Fixed: Ignore case for name validation in providers

(cherry picked from commit 0edc5ba99a15c5f80305b387a053f35fc3f6e51b)

src/Lidarr.Api.V1/ProviderControllerBase.cs

@@ -5,6 +5,7 @@ using FluentValidation.Results;
 using Lidarr.Http.REST;
 using Lidarr.Http.REST.Attributes;
 using Microsoft.AspNetCore.Mvc;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Serializer;
 using NzbDrone.Core.ThingiProvider;
 using NzbDrone.Core.Validation;
@@ -32,7 +33,7 @@ namespace Lidarr.Api.V1
             _bulkResourceMapper = bulkResourceMapper;
 
             SharedValidator.RuleFor(c => c.Name).NotEmpty();
-            SharedValidator.RuleFor(c => c.Name).Must((v, c) => !_providerFactory.All().Any(p => p.Name == c && p.Id != v.Id)).WithMessage("Should be unique");
+            SharedValidator.RuleFor(c => c.Name).Must((v, c) => !_providerFactory.All().Any(p => p.Name.EqualsIgnoreCase(c) && p.Id != v.Id)).WithMessage("Should be unique");
             SharedValidator.RuleFor(c => c.Implementation).NotEmpty();
             SharedValidator.RuleFor(c => c.ConfigContract).NotEmpty();