A more flexible use of the /etc/guest-session/skel hook desirable

The /usr/sbin/guest-account file includes a couple of 'hooks' to make customization of the guest sessions easier. One possibility is to create the /etc/guest-session/skel directory, and fill it with guest session specific stuff that should always be included when launching a guest session.

An idea to extend this possibility was recently discussed at http://ubuntuforums.org/showthread.php?t=1566078. The idea is to create a special purpose regular user, and replace the directory /etc/guest-session/skel with a symlink with the same name.

  sudo ln -s /home/someuser /etc/guest-session/skel

However, that approach proved to require a trailing slash on the line

    gs_skel=/etc/guest-session/skel

in /usr/sbin/guest-account.

The proposed change does not prevent the original idea, i.e. a directory instead of a symlink.