added docs for licensing with hardware identifier

gcontini

2020-10-10 3e8f0cf1feaeb41da4ca1d96d9afdb16486d0273

 src/library/base/string_utils.cpp

@@ -13,7 +13,7 @@
#include <algorithm>
#include <stdexcept>
#include <regex>
#include "StringUtils.h"
#include "string_utils.h"

#ifdef _WIN32
#include <time.h>  //mktime under windows