DELIVERANCE (1972, USA, 109m, 18) **** Adventure, Drama, Thriller dist. Warner Bros. (USA), Columbia-Warner Distributors (UK); pr co. Warner Bros.; d. John Boorman; w. James Dickey, John Boorman (based on the novel by James Dickey); pr. John Boorman; ph. Vilmos Zsigmond (Technicolor | 2.35:1); ed. Tom Priestley; ad. Fred Harpman. cast: Jon Voight (Ed), Burt…