Fix domain whitelisting and remove unused code

src/engine/main.cpp

 #include <AdblockPlus.h>
 #include <functional>
 #include <vector>
 #include <Windows.h>
 
 #include "../shared/AutoHandle.h"
 #include "../shared/Communication.h"
 #include "../shared/Dictionary.h"
 #include "../shared/Utils.h"
 #include "../shared/Version.h"
@@ skipping 102 matching lines @@
                 !text.compare(text.size() - suffixLen, suffixLen, suffix))
             {
               domains.push_back(text.substr(prefixLen, text.size() - prefixLen - suffixLen));
             }
           }
         }
 
         WriteStrings(response, domains);
         break;
       }
+      case Communication::PROC_IS_WHITELISTED_URL:
+      {
+        std::string url;
+        request >> url;
+        AdblockPlus::FilterPtr match = filterEngine->Matches(url, "DOCUMENT", url);
+        response << (match && match->GetType() == AdblockPlus::Filter::TYPE_EXCEPTION);
+        break;
+      }
       case Communication::PROC_ADD_FILTER:
       {
         std::string text;
         request >> text;
 
         filterEngine->GetFilter(text)->AddToList();
         break;
       }
       case Communication::PROC_REMOVE_FILTER:
       {
@@ skipping 106 matching lines @@
     }
     catch (std::runtime_error e)
     {
       DebugException(e);
       return 1;
     }
   }
 
   return 0;
 }