Fix corruption when logging to syslog

syslog(3) used instead of vsyslog(3). Caused corruption in resultant
messages (usually in function name).

src/daemonitor/200_log.c

@@ -161,7 +161,7 @@ void log_func_syslog(int level, const char* fmt, ...)
 
     /* log to syslog */
     va_start(va, fmt);
-    syslog(level, fmt, va);
+    vsyslog(level, fmt, va);
     va_end(va);
 }