Cygwin: get_user_groups: fetch a user's group list from identification token

NetUserGetGroups and NetUserGetLocalGroups sometimes take a lot of time
(up to more than 2 mins) for no apparent reason.

Call s4uauth to generate an identification token for the user and fetch
the group list from there.  This is *much* faster.

Keep the old code only for the sake of WOW64 on Vista and Windows 7,
which don't implement MsV1_0S4ULogon.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/wincap.cc

@@ -39,6 +39,7 @@ wincaps wincap_vista __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_posix_unlink_semantics:false,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:true,
   },
 };
 
@@ -63,6 +64,7 @@ wincaps wincap_7 __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_posix_unlink_semantics:false,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:true,
   },
 };
 
@@ -87,6 +89,7 @@ wincaps wincap_8 __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_posix_unlink_semantics:false,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:false,
   },
 };
 
@@ -111,6 +114,7 @@ wincaps  wincap_10_1507 __attribute__((section (".cygwin_dll_common"), shared))
     has_posix_unlink_semantics:false,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:false,
   },
 };
 
@@ -135,6 +139,7 @@ wincaps wincap_10_1511 __attribute__((section (".cygwin_dll_common"), shared)) =
     has_posix_unlink_semantics:false,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:false,
   },
 };
 
@@ -159,6 +164,7 @@ wincaps wincap_10_1703 __attribute__((section (".cygwin_dll_common"), shared)) =
     has_posix_unlink_semantics:false,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:false,
   },
 };
 
@@ -183,6 +189,7 @@ wincaps wincap_10_1709 __attribute__((section (".cygwin_dll_common"), shared)) =
     has_posix_unlink_semantics:true,
     has_case_sensitive_dirs:false,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:false,
   },
 };
 
@@ -207,6 +214,7 @@ wincaps wincap_10_1803 __attribute__((section (".cygwin_dll_common"), shared)) =
     has_posix_unlink_semantics:true,
     has_case_sensitive_dirs:true,
     has_posix_rename_semantics:false,
+    no_msv1_0_s4u_logon_in_wow64:false,
   },
 };
 
@@ -231,6 +239,7 @@ wincaps wincap_10_1809 __attribute__((section (".cygwin_dll_common"), shared)) =
     has_posix_unlink_semantics:true,
     has_case_sensitive_dirs:true,
     has_posix_rename_semantics:true,
+    no_msv1_0_s4u_logon_in_wow64:true,
   },
 };
 
@@ -303,6 +312,7 @@ wincapc::init ()
       ((wincaps *)caps)->needs_count_in_si_lpres2 = false;
       ((wincaps *)caps)->has_gaa_largeaddress_bug = false;
       ((wincaps *)caps)->has_broken_prefetchvm = false;
+      ((wincaps *)caps)->no_msv1_0_s4u_logon_in_wow64 = false;
     }
 
   __small_sprintf (osnam, "NT-%d.%d", version.dwMajorVersion,