* 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/path.cc

@@ -29,6 +29,7 @@ details. */
 #ifdef FSTAB_ONLY
 #include <sys/cygwin.h>
 #endif
+#include "loadlib.h"
 
 #ifndef FSTAB_ONLY
 /* Used when treating / and \ as equivalent. */