Add 'state.vars[]' to Lua and VAR3-VAR8 to SOC

src/d_think.h

src/deh_lua.c

src/deh_soc.c

src/lua_baselib.c

src/lua_infolib.c

src/lua_libs.h

src/lua_script.h

src/p_action.h

src/p_enemy.c