Watch watches the given filepath for changes, and writes to the returned
channel the new state when it changes. The first event is the initial state
of the root CAs file.
type RootCAs struct {
// PEM is the raw PEM encoding of the CA certificates. PEM []byte// CertPool is the x509.CertPool encoding of the CA certificates. CertPool *x509.CertPool
}
RootCAs is a Root CAs bundle that contains raw PEM encoded CAs, as well as
their x509.CertPool encoding.