A pair of new LWN site features

We have finally added a set of dark mode defaults to the customization options for the site forthose who prefer the dark side. Thanks to all the readers who have askedfor this; apologies for taking so long to do it. The defaults seem good,but we are not dark-mode users, so please let us know if you havesuggestions for improvements.

Another new feature that has been requested for some time is the ability toreceive feature articles via email. These emails are currently availableto subscribers at the "Project Leader" level and higher; interestedsubscribers can sign up for the "Features" list on the mailing-lists page.