Defines starting with `l' in heretic

• LEFT_DIR src/mn_menu.c:12
• LIGHTLEVELS src/r_local.h:24
• LIGHTSCALESHIFT src/r_local.h:27
• LIGHTSEGSHIFT src/r_local.h:25
• LIGHTZSHIFT src/r_local.h:29
• LINE_NEVERSEE src/am_map.h:95
• LOADNET src/dstrings.bak:13
• LOWERSPEED src/p_pspr.c:10