Cannot buid a static Windows restbed library without export any symbol

[madebr]

On current master, you cannot build restbed without exporting any restbed symbol.
This is because __declspec(dllimport) or __declspec(dllexport) is always prepended.

restbed/source/corvusoft/restbed/request.hpp

Lines 24 to 32 in 0c99284

	#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(_WIN64)
	#ifdef WIN_DLL_EXPORT
	#define REQUEST_EXPORT __declspec(dllexport)
	#else
	#define REQUEST_EXPORT __declspec(dllimport)
	#endif
	#else
	#define REQUEST_EXPORT __attribute__((visibility ("default")))
	#endif

There is no path to avoid the __declspec or the __attribute__((visibility ("default"))).