[mod][enh] default timeout 1.8 -> 2.0sec ++ uncyclopedia engine added

searx/settings.yml

     port : 8888
     secret_key : "ultrasecretkey" # change this!
     debug : True
-    request_timeout : 1.8 # seconds
+    request_timeout : 2.0 # seconds
     base_url : False
 
 engines:
     categories : social media
     shortcut : tw
 
+  - name : uncyclopedia
+    engine : mediawiki
+    categories : general
+    shortcut : unc
+    url : https://uncyclopedia.wikia.com/
+
   - name : urbandictionary
     engine        : xpath
     search_url    : http://www.urbandictionary.com/define.php?term={query}