ls: add already listed message

[niyaznigmatullin]

• When recursively dereferencing (-RL) ls is called and there is a descendant that links to its parent, the directory is not listed again, and an error message is printed
• for -L dereference parameter coloring and name printing is fixed (-> shouldn't be printed for symlinks)
• Some tests added for -L and "already listed"

[niyaznigmatullin]

• Changed FileInformation windows syscall flags to handle directories as well

Now ready to merge

[sylvestre]

Cool:
Warning: Congrats! The gnu test tests/ls/infloop is no longer failing!