Function krb5_sys::krb5_sname_to_principal

pub unsafe extern fn krb5_sname_to_principal(context: krb5_context,
                                             hostname: *const c_char,
                                             sname: *const c_char,
                                             type_: krb5_int32,
                                             ret_princ: *mut krb5_principal)
                                             -> krb5_error_code