bug#17578: cp(1) man page: behavior of "cp -R dir target" on symbolic links is unclear

[Paul Eggert]

Pádraig Brady wrote:

   -  -R, -r, --recursive          copy directories recursively
   +  -R, -r, --recursive          copy directories recursively (implies -P)

Unfortunately it's not that simple, as -R doesn't always imply -P.