Issues to resolve for registration

1. Change the default departure time (unlike a typical DebConf 10am is not expected)
2. Lock down early arrival? ✅
3. De-incentivise bursaries with different wording. ✅
4. T-shirt size charts (!18 (merged))
5. Document accommodation (!13 (merged))
6. Review registration form
7. Review bursary instructions (!15 (merged))
8. Put a timeline into important-dates (!10 (merged))
9. Text for registration opening (!22 (merged)) (and announcing DC26 in Argentina)
10. Update COVID-19-related information (!21 (merged))