channel_clear_permission
channel_clear_permission(ssh, FORWARD_ADM, where);
void channel_clear_permission(struct ssh *, int, int);
channel_clear_permission(ssh, FORWARD_ADM, where);
channel_clear_permission(ssh, FORWARD_USER, FORWARD_LOCAL);
channel_clear_permission(ssh, FORWARD_USER, FORWARD_REMOTE);
channel_clear_permission(ssh, FORWARD_ADM, where);