qlan.pl replacement scripts come in two-foild:
- get_qlan.sh for an overview of LAN interface (incl. IP address)
- get_qlan_details.sh for an in-depth LAN overview
==> both scripts will only return output for HP-UX 11.31. Did not
bother for older versions (yet)
- plugins/get_lan_desc.sh: comment out the nwmgr call as it is now
  redundant
--> linked to issue #1

plugins/firmware_collect.sh: make it work for HP-UX 11.31 (issue #3)