UPDATE 1 — Flavio Bolsonaro slightly leads Lula in Brazil runoff, Quaest poll shows
(Adds more details and context in bullets 1-4) SAO PAULO, Oct 14 (Reuters) — Brazilian Senator Flavio Bolsonaro was seen slightly ahead of President Luiz Inacio Lula da Silva heading into the October 25 presidential runoff, a Quaest poll showed on Wednesday. The right-wing senator, the eldest son of former President Ja