Fixed #17967: Hide "Change Password" link in admin if user.has_usable_password is False.

                {% if docsroot %}

                    <a href="{{ docsroot }}">{% trans 'Documentation' %}</a> /

                {% endif %}

                {% if user.has_usable_password %}

                <a href="{% url 'admin:password_change' %}">{% trans 'Change password' %}</a> /

                {% endif $}

                <a href="{% url 'admin:logout' %}">{% trans 'Log out' %}</a>

            {% endblock %}

        </div>