* 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/mkgroup.c

@@ -1,7 +1,7 @@
 /* mkgroup.c:
 
    Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-   2007, 2008, 2009 Red Hat, Inc.
+   2007, 2008, 2009, 2010 Red Hat, Inc.
 
    This file is part of Cygwin.
 
@@ -28,6 +28,7 @@
 #include <ntsecapi.h>
 #include <dsgetdc.h>
 #include <ntdef.h>
+#include "loadlib.h"
 
 #define print_win_error(x) _print_win_error(x, __LINE__)