Merge branch 'enable-plugins' into 'master'

enable https rewrite and tracker url

See merge request !126

searx/settings.yml

@@ -111,6 +111,8 @@ outgoing: # communication with search engines
 enabled_plugins:
   - "Calculator"
   - "Search on category select"
+  - "Tracker URL remover"
+  - "HTTPS rewrite"
 #   - ...
 
 # Example to rewrite hostnames in external links

searx/templates/etheme/results.html

@@ -25,7 +25,7 @@
             </div>
             {% endif %}
 
-            {% if answers -%}
+            {% if answers and 'general' in selected_categories -%}
             {%- for answer in answers.values() %}
             <div class="result well">
               {% if answer.url %}