cygwin: wincap: handle W10 1703

Add has_unprivileged_createsymlink flag and set to true on 1703 and
later.

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

winsup/cygwin/wincap.cc

@@ -31,6 +31,7 @@ wincaps wincap_vista __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_broken_prefetchvm:false,
     has_new_pebteb_region:false,
     has_broken_whoami:true,
+    has_unprivileged_createsymlink:false,
   },
 };
 
@@ -48,6 +49,7 @@ wincaps wincap_7 __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_broken_prefetchvm:false,
     has_new_pebteb_region:false,
     has_broken_whoami:true,
+    has_unprivileged_createsymlink:false,
   },
 };
 
@@ -65,6 +67,7 @@ wincaps wincap_8 __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_broken_prefetchvm:false,
     has_new_pebteb_region:false,
     has_broken_whoami:false,
+    has_unprivileged_createsymlink:false,
   },
 };
 
@@ -82,6 +85,7 @@ wincaps wincap_10 __attribute__((section (".cygwin_dll_common"), shared)) = {
     has_broken_prefetchvm:true,
     has_new_pebteb_region:false,
     has_broken_whoami:false,
+    has_unprivileged_createsymlink:false,
   },
 };
 
@@ -99,6 +103,25 @@ wincaps wincap_10_1511 __attribute__((section (".cygwin_dll_common"), shared)) =
     has_broken_prefetchvm:false,
     has_new_pebteb_region:true,
     has_broken_whoami:false,
+    has_unprivileged_createsymlink:false,
+  },
+};
+
+wincaps wincap_10_1703 __attribute__((section (".cygwin_dll_common"), shared)) = {
+  def_guard_pages:2,
+  {
+    is_server:false,
+    needs_count_in_si_lpres2:false,
+    has_gaa_largeaddress_bug:false,
+    has_broken_alloc_console:true,
+    has_console_logon_sid:true,
+    has_precise_system_time:true,
+    has_microsoft_accounts:true,
+    has_processor_groups:true,
+    has_broken_prefetchvm:false,
+    has_new_pebteb_region:true,
+    has_broken_whoami:false,
+    has_unprivileged_createsymlink:true,
   },
 };
 
@@ -144,9 +167,10 @@ wincapc::init ()
       default:
 	if (version.dwBuildNumber < 10586)
 	  caps = &wincap_10;
-	else
+	else if (version.dwBuildNumber < 15063)
 	  caps = &wincap_10_1511;
-	break;
+	else
+	  caps = &wincap_10_1703;
     }
 
   ((wincaps *)caps)->is_server = (version.wProductType != VER_NT_WORKSTATION);

winsup/cygwin/wincap.h

@@ -26,6 +26,7 @@ struct wincaps
     unsigned has_broken_prefetchvm		: 1;
     unsigned has_new_pebteb_region		: 1;
     unsigned has_broken_whoami			: 1;
+    unsigned has_unprivileged_createsymlink	: 1;
   };
 };
 
@@ -67,6 +68,7 @@ public:
   bool	IMPLEMENT (has_broken_prefetchvm)
   bool	IMPLEMENT (has_new_pebteb_region)
   bool	IMPLEMENT (has_broken_whoami)
+  bool	IMPLEMENT (has_unprivileged_createsymlink)
 
 #undef IMPLEMENT
 };