Merge branch 'next' into linedef-args

src/lua_hook.h

src/lua_hooklib.c

src/lua_maplib.c

src/p_map.c

src/p_maputl.c

src/p_maputl.h

src/p_setup.c

src/p_spec.c

src/p_tick.c

src/r_defs.h