Christine McVie, the singer, songwriter and keyboardist whose dreamily optimistic tunes for Fleetwood Mac — including such FM-radio staples as “Don’t Stop,” “Little Lies,” “Songbird,” “Everywhere” and “You Make Loving Fun” — helped make the band one of the most successful acts in music history, died Wednesday. In a famously fractious outfit filled with competing songwriters — Fleetwood Mac’s classic …
