Peter M. Groen / libmodbus

Thank you AlexMaz.

https://www.securecoding.cert.org/confluence/display/seccode/DCL37-C.+Do+not+declare+or+define+a+reserved+identifier
Not applied to libmodbus constants for now...

- update documentation
- 5 new tests
- updated NEWS file
- avoid include of time.h

The index variable shadowed a variable in the standard library causing
warnings. Renaming the 'index' variable to 'idx' resolves the issue.

It's strongly recommended to update your libmodbus library if you
use it in a slave/server application in a not trusted environment.

Debian package of libmodbus 3.0.4 already contains a patch to
mitigate the exploit but the patch isn't as strong than this one.

Thank you very much James Nutaro.

Thanks to Jan Kardell.

This regression comes from Visual Studio patches.

- change return argument from void to int
- update documentation

Thanks to Karl Palsson.

DLL if required.

Thanks to Petr Gladkiy

Thank you Petr Gladkiy

Thanks to oldfaber and endrelovas.

Simply run cscript configure.js from the win32 directory to generate
the files needed to create the modbus DLL.