* loadlib.h: New header implementing safe LoadLibrary calls.

Include throughout files using LoadLibrary function.
	* cygcheck.cc (dump_sysinfo): Retrieve kernel32.dll handle via
	GetModuleHandle, rather than using LoadLibrary.
	* cygpath.cc (get_long_name): Ditto.
	(do_sysfolders): Append .dll suffix in LoadLibrary call.
	* ldh.cc (WinMain): Use LoadLibraryExW with DONT_RESOLVE_DLL_REFERENCES
	to avoid loading malicious library code.
	* locale.cc (print_locale_with_codeset): Change way to retrieve
	kernel32.dll path.

winsup/utils/strace.cc

@@ -26,6 +26,7 @@ details. */
 #include "cygwin/include/sys/cygwin.h"
 #include "path.h"
 #undef cygwin_internal
+#include "loadlib.h"
 
 /* we *know* we're being built with GCC */
 #define alloca __builtin_alloca