Respect 79 characters perl line in puavo-update-client.
On puavo-update-client do use the basic auth with
ldapdn/ldappassword to authenticate laptops/wirelessaccesspoints.
This fixes doing configuration updates from "cloud-puavo".
In image updates (for laptops and such), use
"images.$(cat /etc/puavo/topdomain)" as a fallback image server
if a more immediate image server is not available.
Raise rate-limit for image update downloads by factor of ten.
puavo-update-client: Allow setting rate limit
by puavo-tags (tag format is imagedownload-rate-limit:[0-9]+k).
On ltspimage updates, read .imageservers[] from /etc/puavo/device.json
and take the first one if such exists.  This is used if dns
does not respond with anything sensible, but before
the "images.$(cat /etc/puavo/topdomain)" fallback.
Merge branch 'laptop_update_fixes'

Make laptops and wirelessaccesspoint updates work without
a bootserver.