[3427] parseConfiguration() log_config parameter is now const referenced.

src/lib/dhcpsrv/logging.cc

@@ -34,7 +34,7 @@ LogConfigParser::LogConfigParser(const ConfigurationPtr& storage)
     }
 }
 
-void LogConfigParser::parseConfiguration(isc::data::ConstElementPtr loggers,
+void LogConfigParser::parseConfiguration(const isc::data::ConstElementPtr& loggers,
                                          bool verbose) {
     verbose_ = verbose;
 

src/lib/dhcpsrv/logging.h

@@ -61,7 +61,7 @@ public:
     ///
     /// @param log_config JSON structures to be parsed (loggers list)
     /// @param verbose specifies verbose mode (true forces DEBUG, debuglevel = 99)
-    void parseConfiguration(isc::data::ConstElementPtr log_config,
+    void parseConfiguration(const isc::data::ConstElementPtr& log_config,
                             bool verbose = false);
 
     /// @brief Applies stored configuration