SOUTHERN COMFORT (1981, USA, 106m, 15) ***½ Action, Thriller dist. Twentieth Century Fox (USA), EMI Distribution (UK); pr co. Cinema Group Ventures / Phoenix Films; d. Walter Hill; w. Michael Kane, Walter Hill, David Giler; pr. David Giler; ph. Andrew Laszlo (DeLuxe | 1.85:1); m. Ry Cooder; ed. Freeman A. Davies; pd. John Vallone. cast:…