remove self info answers from pages after first one

searx/plugins/self_info.py

 #  request: flask request object
 #  ctx: the whole local context of the pre search hook
 def post_search(request, ctx):
+    if ctx['search'].pageno > 1:
+        return True
     if ctx['search'].query == 'ip':
         x_forwarded_for = request.headers.getlist("X-Forwarded-For")
         if x_forwarded_for:

tests/unit/test_plugins.py

         request = Mock(user_plugins=store.plugins,
                        remote_addr='127.0.0.1')
         request.headers.getlist.return_value = []
-        ctx = get_search_mock(query='ip')
+        ctx = get_search_mock(query='ip', pageno=1)
         store.call('post_search', request, ctx)
         self.assertTrue('127.0.0.1' in ctx['search'].result_container.answers)
 
+        ctx = get_search_mock(query='ip', pageno=2)
+        store.call('post_search', request, ctx)
+        self.assertFalse('127.0.0.1' in ctx['search'].result_container.answers)
+
         # User agent test
         request = Mock(user_plugins=store.plugins,
                        user_agent='Mock')
         request.headers.getlist.return_value = []
 
-        ctx = get_search_mock(query='user-agent')
+        ctx = get_search_mock(query='user-agent', pageno=1)
         store.call('post_search', request, ctx)
         self.assertTrue('Mock' in ctx['search'].result_container.answers)
 
-        ctx = get_search_mock(query='user-agent')
+        ctx = get_search_mock(query='user-agent', pageno=2)
+        store.call('post_search', request, ctx)
+        self.assertFalse('Mock' in ctx['search'].result_container.answers)
+
+        ctx = get_search_mock(query='user-agent', pageno=1)
         store.call('post_search', request, ctx)
         self.assertTrue('Mock' in ctx['search'].result_container.answers)
 
-        ctx = get_search_mock(query='What is my User-Agent?')
+        ctx = get_search_mock(query='user-agent', pageno=2)
+        store.call('post_search', request, ctx)
+        self.assertFalse('Mock' in ctx['search'].result_container.answers)
+
+        ctx = get_search_mock(query='What is my User-Agent?', pageno=1)
         store.call('post_search', request, ctx)
         self.assertTrue('Mock' in ctx['search'].result_container.answers)
+
+        ctx = get_search_mock(query='What is my User-Agent?', pageno=2)
+        store.call('post_search', request, ctx)
+        self.assertFalse('Mock' in ctx['search'].result_container.answers)