authPersistSingleRequest is only for NTML, not for all Windows authentication providers.

[jhkimnew]

IIS doc should mention that authPersistSingleRequest is only for NTML Windows Auethentication provider so that users can use authPersistSingleRequest only for NTML authentication and use authPersistNonNTML only for other authentication types of Windows Authentication.

See https://docs.microsoft.com/en-us/iis/configuration/system.webserver/security/authentication/windowsauthentication/.

It did not point out that authPersistSingleRequest is only for NTLM authentication.

[bariscaglar]

@jhkimnew you can actually make this change since it should be a simple addition to the existing documentation.