Fix CLARIN Attribute Aggregator SP scrip

The [clarin-sp-aaggregator](https://github.com/ufal/clarin-sp-aaggregator)
hasn't been working for some time.  Digging into the details showed that
we broke the functionality with d6a64be5 while fixing #62.

Here, we fix the problem: connect to 127.0.0.1 via http on port 443.

Fixes #70

dockerfiles/nginx/aa-statistics.php

@@ -95,7 +95,7 @@ for ($i=$assertion_count; 0 < $i; --$i)
     
     if(!empty($assertion_link))
     {
-        $assertion_link = str_replace("https://" . getenv("SERVER_NAME"), "https://127.0.0.1", $assertion_link);
+        $assertion_link = str_replace("https://" . getenv("SERVER_NAME"), "http://127.0.0.1:443", $assertion_link);
         //TODO add a timeout
         // need to ignore that certificate does not match 127.0.0.1
         $arrContextOptions=array(