$OpenBSD: patch-doc_userguide_conf_py,v 1.1 2021/06/17 23:00:59 daniel Exp $

For sphinx 4 support

Index: doc/userguide/conf.py
--- doc/userguide/conf.py.orig
+++ doc/userguide/conf.py
@@ -135,7 +135,7 @@ if not on_rtd:
     except:
         html_theme = 'default'
     def setup(app):
-        app.add_stylesheet('css/suricata.css')
+        app.add_css_file('css/suricata.css')
 else:
     html_context = {
         'css_files': [
