* grp.cc (internal_getgroups): Drop unused cygsid variable.

* sec_helper.cc (cygpsid::pstring): Use sid_sub_auth_count macro.
	(cygsid::get_sid): Use MAX_SUBAUTH_CNT rather than wrong constant 8.
	Don't call memcpy to copy subauthorities into SID, use assignment.
	(cygsid::getfromstr): Use MAX_SUBAUTH_CNT rather than wrong constant 8.
	* security.h (MAX_SUBAUTH_CNT): New definition.  Set to 11 to cover
	Microsoft Accounts.
	(MAX_SID_LEN): Define in terms of SID member sizes and MAX_SUBAUTH_CNT.
	(DBGSID): Use MAX_SUBAUTH_CNT to define size of SubAuthority array.
	* uinfo.cc (pwdgrp::fetch_account_from_windows): Handle Micosoft
	Accounts.  Handle them as well known group.  Compare domain names
	case-insensitive.
	* winlean.h (PIPE_REJECT_REMOTE_CLIENTS): Drop temporary definition
	since Mingw64 catched up.
	(DNLEN): Redefine as 16.  Explain why.

winsup/cygwin/winlean.h

@@ -1,6 +1,6 @@
 /* winlean.h - Standard "lean" windows include
 
-   Copyright 2010, 2011, 2012, 2013 Red Hat, Inc.
+   Copyright 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -58,11 +58,6 @@ details. */
 #include <lmcons.h>
 #include <ntdef.h>
 
-/* Temporary kludge for missing flag in Mingw64's w32api. */
-#ifndef PIPE_REJECT_REMOTE_CLIENTS
-#define PIPE_REJECT_REMOTE_CLIENTS 8
-#endif
-
 #ifdef __undef_IN
 #undef IN
 #endif
@@ -79,6 +74,13 @@ details. */
 #undef CRITICAL
 #endif
 
+/* So-called "Microsoft Account" SIDs have a netbios domain name
+   "MicrosoftAccounts".  The problem is, while DNLEN is 15, that domain
+   name is 16 chars :-P  So we override DNLEN here to be 16, so that calls
+   to LookupAccountSid/Name don't fail if the buffer is based on DNLEN. */
+#undef DNLEN
+#define DNLEN 16
+
 /* When Terminal Services are installed, the GetWindowsDirectory function
    does not return the system installation dir, but a user specific directory
    instead.  That's not what we have in mind when calling GetWindowsDirectory