Function krb5_sys::krb5_cc_get_config

pub unsafe extern fn krb5_cc_get_config(context: krb5_context,
                                        id: krb5_ccache,
                                        principal: krb5_const_principal,
                                        key: *const c_char,
                                        data: *mut krb5_data)
                                        -> krb5_error_code