For files intended to support unixy freedesktopy systems,
reduce the ifdef down to __unix__ && !__APPLE__ && !__ANDROID__,
rather than naming linux and all the BSDs and so on by hand.
Should simplify adding support for systems like illumos in the
future.
Co-authored-by: Michael Steenbeek <m.o.steenbeek@gmail.com>
While OpenRCT2 already had code to look up the Steam path on macOS and Linux, it didn't look in the correct directory. This meant that it wouldn't detect the presence of RCT2, even if the user had downloaded it via the Steam Console.
Clang-format sees the text behind `#pragma region` as code and formats it. Instead of stating the copyright and date there, it's now in the comment block right below it. The text "Copyright" is left in the `#pragma region` line, as clang-format sees it as a single identifier.
I took the opportunity to normalize the dates, and add the copyright notice to the source files where it was missing them (except for third-party and the generated resources.h file).
