busybox

Patch from Rich Felker:
- duplicated format bit 14 forced LIST_EXEC always-on
- -p option was behaving just like -F (SUSv3 says -p only shows / for
  dirs, not other special symbols)
- tests for LIST_EXEC in color functions were nonsense (constant
  tests). i assume they were supposed to be (all_fmt & LIST_EXEC)
  however having coloring of executable files depend on -F seems
  undesirable.