New:
- Add support for FreeBSD & Haiku.
- Improve MSYS2 support.
- Support for GCC ext-numeric-literals flag.
- Switched Make to use CXX and CXXFLAGS variable names.
Bugs:
- Fix server socket issue on IPv4-only platforms (Haiku).
- Fix memory leak with missing server socket destructor.
- Added missing double quotes in MSVC scripts for spaces in paths.