Pull request: Add security to openapi spec

Merge in DNS/adguard-home from 2392-docs to master

Closes #2392.

* commit 'a86172fda426ab24dc5e82c84b380fe110f169fc':
  Add security to openapi spec

openapi/openapi.yaml

@@ -12,6 +12,9 @@
 'servers':
 - 'url': '/control'
 
+'security':
+- 'basicAuth': []
+
 'tags':
 - 'name': 'clients'
   'description': 'Clients list operations'
@@ -2084,3 +2087,7 @@
           'description': 'The error message, an opaque string.'
           'type': 'string'
       'type': 'object'
+  'securitySchemes':
+    'basicAuth':
+      'type': 'http'
+      'scheme': 'basic'