Adds support to m_highlightJSON in RuleMessage class

This variable helds a JSON with information regarding all matches.
Only filled when IncludeFullHighlightLog property is set.

src/modsecurity.cc

@@ -207,6 +207,8 @@ void ModSecurity::serverLog(void *data, std::shared_ptr<RuleMessage> rm) {
     if (m_logProperties & RuleMessageLogProperty) {
         const void *a = static_cast<const void *>(rm.get());
         if (m_logProperties & IncludeFullHighlightLogProperty) {
+            processContentOffset(rm->m_buf.c_str(), rm->m_buf.size(),
+                rm->m_reference.c_str(), &rm->m_highlightJSON, NULL);
             m_logCb(data, a);
             return;
         }

src/rule_message.cc

@@ -93,7 +93,10 @@ std::string RuleMessage::log(const RuleMessage *rm, int props, int code) {
     return modsecurity::utils::string::toHexIfNeeded(msg);
 }
 
-
+/*
+ * Depricated. Do not use. Should be removed before merge.
+ *
+ */
 RuleMessageHighlight RuleMessage::computeHighlight(const RuleMessage *rm,
     const std::string buf) {
     RuleMessageHighlight ret;