The Holiday Hootenanny chat is one of the Washington Post’s most beloved annual traditions — the holiday-themed edition of Carolyn Hax Live. It started way back in 2000, and has been going ever since. Carolyn was online Friday, Dec. 13. The Holiday Hootenanny chat is one of the Washington Post’s most beloved annual traditions — the holiday-themed edition of Carolyn Hax Live. It started way back in 2000, and has…