Issue 6916 - Encapsulate filter subscriptions

lib/iniParser.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 92 matching lines @@
             case "subscription filters":
               if (this.subscriptions.length)
               {
                 let currentSubscription = this.subscriptions[
                   this.subscriptions.length - 1
                 ];
                 for (let text of this._curObj)
                 {
                   let filter = Filter.fromText(text);
                   currentSubscription.filters.push(filter);
-                  filter.subscriptions.add(currentSubscription);
+                  filter.addSubscription(currentSubscription);
                 }
               }
               break;
           }
         }
 
         if (line === null)
           return;
 
         this._curSection = match[1].toLowerCase();
@@ skipping 20 matching lines @@
     }
     finally
     {
       Filter.knownFilters = origKnownFilters;
       Subscription.knownSubscriptions = origKnownSubscriptions;
     }
   }
 }
 
 exports.INIParser = INIParser;