Peter M. Groen / libmodbus

Thanks to @peternewman

Fix for #542

Fix #513

Add Embox RTOS to the list of supported OSes

There is a small typo in tests/bandwidth-client.c.

Should read `response` rather than `reponse`.

When compiling with gcc and option -Wconversion it fixes the
warning message

  warning: conversion from ‘X’ {aka ‘x’} to ‘Y’ {aka ‘y’} may change value

Signed-off-by: José Bollo <jose.bollo@iot.bzh>

In case resulting value should be negative it is incorrect to use '+' operator to construct it from pieces, because highest bytes will result in negative number after bitwise shift while others will stay positive. Replacing addition with '|' should solve the issue.

Since SPDX release 3.0 LGPL-2.1+ became LGPL-2.1-or-later. Hence
replace the deprecated identifiers.

I can't believe I committed that copy/paste mistake.
Sorry Maor Vermucht and Or Peles, excepted naming your original
patch was OK.

Thank you Karl Palsson for your review.

Schneider Automation has become Schneider Electric, which refers to modbus.org.

Add a .appveyor.yml config to enable Win32 CI testing. At current this
only runs a cygwin64 build on a recent version of Cygwin/Windows.

Closes #461

This patch was contributed by Maor Vermucht and Or Peles from
VDOO Connected Trust.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>

- AC_FUNC_FORK, neved used.
- AC_FUNC_MALLOC, using a cross toolchain, it's checked on build
  architecture!
- memset should be always available.

Thanks to oldfaber for the proposal.

Thanks to @JCWren

I hope this was the correct place to fix it. I don't know asciidoc.

Found with the help of clang-format (from another branch)