Get Windows interface list from the registry if the COM service fails.

gns3server/modules/attic.py

@@ -129,7 +129,7 @@ def has_privileged_access(executable):
     if os.geteuid() == 0:
         # we are root, so we should have privileged access.
         return True
-    if os.stat(executable).st_mode & stat.S_ISUID:
+    if os.stat(executable).st_mode & stat.S_ISUID or os.stat(executable).st_mode & stat.S_ISGID:
         # the executable has set UID bit.
         return True