Adding claims with non-ascii character to headers fails

[davidmarekmsft]

If a user has non-ascii characters in their name, the service will throw an exception when trying to add the name claim to response headers in AddResponseHeadersFromClaims.

System.InvalidOperationException: 'Invalid non-ASCII or control character in header: 0x00F6'
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.ThrowInvalidHeaderCharacter(Char ch)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.ValidateHeaderValueCharacters(StringValues headerValues)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpResponseHeaders.AddValueFast(String key, StringValues value)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.System.Collections.Generic.IDictionary<System.String,Microsoft.Extensions.Primitives.StringValues>.Add(String key, StringValues value)
   at OCP.Msal.Proxy.Web.Controllers.AuthController.AddResponseHeadersFromClaims(IEnumerable`1 claims, IHeaderDictionary headers) in C:\Users\x\src\EasyAuthForK8s\OCP.Msal.Proxy.Web\Controllers\AuthController.cs:line 111

[github-actions]

Message that will be displayed on users' first issue