always cleans up after itself.
Fix a bug where Operation::User::_submenu was still using form->process. Switched
to using stow instead.
If the uid is "new", links for delete and become user are not shown anymore.
Multiple IPs are separated by commas, whitespace is ignored.
In groups, that affects the ipFilter field, User::isInGroup.
In settings, that affects Settings::debugIp and Session::ErrorHandler::canShowDebug.
Fixed a bug in WebGUI::Utility::isInSubnet where Net::Subnets->check needs a scalar.
Modified t/User.t to use addresses in CIDR format.
