Log to file as dedicated server (do not use syslog any more).

src/core/common/loghelper_client.cpp

@@ -27,6 +27,12 @@
 
 using namespace std;
 
+void
+loghelper_init(const std::string & /*logDir*/)
+{
+	// Do not log to file as client.
+}
+
 void
 internal_log_err(const string &msg)
 {