Fix and clarify comments for GLFWAPI

include/GLFW/glfw3.h

@@ -262,13 +262,12 @@ extern "C" {
  /* We are building GLFW as a Win32 DLL */
  #define GLFWAPI __declspec(dllexport)
 #elif defined(_WIN32) && defined(GLFW_DLL)
- /* We are calling GLFW as a Win32 DLL */
+ /* We are calling a GLFW Win32 DLL */
  #define GLFWAPI __declspec(dllimport)
 #elif defined(__GNUC__) && defined(_GLFW_BUILD_DLL)
- /* We are building GLFW as a shared / dynamic library */
+ /* We are building GLFW as a Unix shared library */
  #define GLFWAPI __attribute__((visibility("default")))
 #else
- /* We are building or calling GLFW as a static library */
  #define GLFWAPI
 #endif