Reactivate sphinx-notfound-page (#4038)

Author: abravalheri

docs/conf.py

@@ -232,7 +232,7 @@
 html_static_path = ['images']  # should contain the folder with icons
 
 # Add support for nice Not Found 404 pages
-# extensions += ['notfound.extension']  # readthedocs/sphinx-notfound-page#219
+extensions += ['notfound.extension']
 
 # List of dicts with <link> HTML attributes
 # static-file points to files in the html_static_path (href is computed)

setup.cfg

@@ -108,7 +108,7 @@ docs =
 	sphinx-inline-tabs
 	sphinx-reredirects
 	sphinxcontrib-towncrier
-	sphinx-notfound-page == 0.8.3
+	sphinx-notfound-page >=1,<2
 	sphinx-hoverxref < 2
 
 ssl =