LocalServerCertificateSelector
getset
public Func<ConnectionContext, string, X509Certificate2> LocalServerCertificateSelectorA callback that will be invoked to dynamically select a local server certificate. This is higher priority than LocalCertificate. If SNI is not available then the name parameter will be null.
If the certificate has an Extended Key Usage extension, the usages must include Server Authentication (OID 1.3.6.1.5.5.7.3.1).
