(LEAD) U.S. to release second blacklist of N. Korean officials involved in human rights abuses in December

(ATTN: ADDS comments about U.S. efforts to sanction companies exploiting N.K. labor)By Chang Jae-soon

WASHINGTON, Oct. 25 (Yonhap) -- The United States plans to release a second blacklist in December of North Korean officials and entities to be sanc