Update relbar

layout.html

{% extends "!layout.html" %}
  {%- block linktags %}
    {%- if hasdoc('about') %}
        <link rel="author" title="{{ _('About these documents') }}"
              href="{{ pathto('about') }}"/>
    {%- endif %}
    <!-- {%- if hasdoc('genindex') %}                                                                                                                                                                               
     !--     <link rel="index" title="{{ _('Index') }}"                                                                                                                                                             
     !--           href="{{ pathto('genindex') }}"/>                                                                                                                                                                
     !-- {%- endif %} -->
    {%- if hasdoc('search') %}
	<link rel="search" title="{{ _('Search') }}" href="{{ pathto('search') }}"/>
    {%- endif %}
    {%- if hasdoc('copyright') %}
	<link rel="copyright" title="{{ _('Copyright') }}" href="{{ pathto('copyright') }}"/>
    {%- endif %}
    <link rel="top" title="{{ docstitle|e }}" href="{{ pathto('index') }}"/>
    {%- if parents %}
	<link rel="up" title="{{ parents[-1].title|striptags|e }}" href="{{ parents[-1].link|e }}"/>
    {%- endif %}
    {%- if next %}
	<link rel="next" title="{{ next.title|striptags|e }}" href="{{ next.link|e }}"/>
    {%- endif %}
    {%- if prev %}
	<link rel="prev" title="{{ prev.title|striptags|e }}" href="{{ prev.link|e }}"/>
    {%- endif %}
{%- endblock %}