Fix cp behaviour to match POSIX spec
Fix ls for dotfiles as arguments
Fix std_getopt misuse
Replace empty getopt with noopt
Fix cp chmod for symlinks
Match tertium API
Replace serr with %r
Fix recursion behaviour

* Ignore hidden directories when '-Aa' is not given
* Always print ("%s:", dirname) when '-R' is given
Fix invalid memory access
Ignore printlink type error
Fix target search
Create tmp files in the same device
Match tertium API
Add whoami manpage