(LEAD) Moon, Xi overcome 'awkwardness' over THAAD through summit: official
(ATTN: UPDATES with agreement to resume dozens of dialogue channels in last 3 paras)
SEOUL, Dec. 17 (Yonhap) -- President Moon Jae-in and Chinese President Xi Jinping "completely overcame the awkwardness" stemming from the deployment of a U.S. missile