3.8.2 - Twilight Struggle closed-tournament fix

Fixed

• A Twilight Struggle tournament sent with the status Closed is treated as closed. The check compared against the exact lowercase text closed. A site that capitalises its status names left every finished tournament in the active part of the subscription list. It carried no closed badge, and there was no way to tidy it away. The check now ignores capitalisation and surrounding spaces. Registration Closed still counts as open, and the API reference says so. (#275)