[enh] add blocked_plugins setting do completly remove plugin from query processing

searx/plugins/__init__.py

@@ -226,7 +226,10 @@ def plugin_module_names():
 
 
 def initialize(app):
+    # it is possible to block plugins from being registered into plugin chain
+    blocked_plugins = settings['outgoing'].get('blocked_plugins', [])
+
     for module_name, external in plugin_module_names():
         plugin = load_and_initialize_plugin(module_name, external, (app, settings))
-        if plugin:
+        if plugin and plugin.name not in blocked_plugins:
             plugins.register(plugin)

searx/settings.yml

@@ -157,6 +157,12 @@ outgoing:
 #   - plugin2
 #   - ...
 
+# Plugins listed here will be loaded, but will not be registered into plugins chain.
+# The engine will not use them to process queries.
+#
+#  blocked_plugins:
+#    - 'Self Informations'
+
 # Comment or un-comment plugin to activate / deactivate by default.
 #
 # enabled_plugins: