Add a call to BumpModified() so that the portal daemon will push

out the group changes. This is the wrong way to do this, but a real
fix will wait until I have to deal with it in CloudLab.

tbsetup/modgroups.in

@@ -374,6 +374,10 @@ if (@addlist || @modlist) {
 system("$SETGROUPS $user") == 0 or
     fatal("$SETGROUPS $user failed!");
 
+# XXX Mark the user as modified so the portal daemon withh push
+# out the new groups. This is wrong, but a real fix will need to wait.
+$target_user->BumpModified();
+
 exit(0);
 
 sub fatal($) {