Add support for get/set_fededration_multicast

Basic support for iLO federation, mainly to enable/disable the feature.
add get_federation_multicast output
Add get/set_server_fqdn
add sample output
Add alertmail_smtp_port
Fix mod_network_settings(dhcp_static_route)
New iLO firmware versions
Actually update the version
New firmware versions, even for ilo 1!
Another backwards incompatibility we need to work around
Version 2.6.2
Actually, all iLO versions now support this new format
Make hpilo_mirror spew a diff so it becomes cron'able
ilo4 firmware 1.51
Fix ilo4 link
Fix fragile mirror script once more
ElementTree's __bool__ raises a FutureWarning
Catch server errors in firmware updates
xmldata: make it work with python3 and --{save,read}-response
use timeout value for xmldata