Adds new method for rule merge

IMPORTANT: SecDefaultAction specified on a child configuration will
overwrite the ones specified on the parent; Previously it was
concatenating.

headers/modsecurity/rule_marker.h

@@ -45,11 +45,6 @@ class RuleMarker : public Rule {
         m_name(std::make_shared<std::string>(name)) { }
 
 
-    virtual bool evaluate(Transaction *transaction,
-        std::shared_ptr<RuleMessage> rm) override {
-        return evaluate(transaction);
-    }
-
     virtual bool evaluate(Transaction *transaction) override {
         if (transaction->isInsideAMarker()) {
             if (*transaction->getCurrentMarker() == *m_name) {