FS-10167: Fixed small ISO C compliancy issue for windows build vs linux build of testwebsock

libs/libks/test/testwebsock.c

 #include <ks.h>
 #include <tap.h>
 
+#ifdef _WINDOWS_
+#undef unlink
+#define unlink _unlink
+#endif
 
 static char v4[48] = "";
 static char v6[48] = "";
@@ -276,7 +280,7 @@ int main(void)
 		ok(test_ws(v6, 1));
 	}
 
-	_unlink("./testwebsock.pem");
+	unlink("./testwebsock.pem");
 	ks_shutdown();
 
 	done_testing();