This reverts commit 788e760b51. NixOS
doesn't even have an /etc/skel. And if we had, 1) NixOS has the
ability to create regular files rather than symlinks in /etc
(environment.etc.<file>.mode = ...), so files in /etc/skel that should
be copied as regular files can be supported; and 2) we may actually
*want* to copy a symlink.
Also, typos in file names. Bleh.
