conf: add a search box, show related docs

doc/conf.py.in

@@ -92,21 +92,8 @@ highlight_language = 'rst'
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
+
 html_theme = 'alabaster'
-html_sidebars = {
-    '**': [
-        'about.html',
-        'navigation.html',
-    ]
-}
-
-html_theme_options = {
-    'font_family': 'Inconsolata',
-    'font_size': '16px',
-    'show_powered_by': 'false',
-    'description': 'managed by @PROJECT_AUTHOR@'
-}
-
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -114,6 +101,14 @@ html_theme_options = {
 #
 # html_theme_options = {}
 
+html_theme_options = {
+    'font_family': 'Inconsolata',
+    'font_size': '16px',
+    'show_powered_by': 'false',
+    'description': 'managed by @PROJECT_AUTHOR@',
+    'show_related': True,
+}
+
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
@@ -137,6 +132,7 @@ html_sidebars = {
         'about.html',
         'navigation.html',
         'relations.html',  # needs 'show_related': True theme option to display
+        'searchbox.html',
     ]
 }