Running ntp and puavo-set-sane-date on a
(locally installed) wireless access point is useful.
Wrap lines under 80 characters, and use $hosttype.
Rename puavo-update-laptop to puavo-update-thishost,
thus better reflecting new state of affairs
(it is used to update wireless accesspoints as well).
In puavo-install-grub, ${hosttype} must be expanded
in grub configuration line (while ${imagepath} should be not).
On wirelessaccesspoints, make partitioning similar as in laptops,
but make partitions half the size when compared to laptops.
Do without /home, because no users are expected to use these
machines (note that this means there are no persistent home
directories).  Instead, reserve the "rest of space" to system images.
Use whitespace consistently.
Update usage error message in puavo-update-thishost.