Fix permissions.
Add SSH configuration
Fix shell path
Fix recursion issue with symlinks (not relevant with current source)
Should now be possible to clone, run `./install.pl server` and have a
working chroot/ssh login.
Configures a chroot with Perl and bin/pgen-server to run a shell.
ssh to 'pgen@localhost' successful shows pgen-server test message then
logs out.
'add_key' and 'remove_server' functions also work. Recursive path
builder function 'dig_dirs' also works well within the latter.