[bug] "/ip neighbor discovery export" doesn't work

While /export includes the ip neighbor discovery stuff, /ip neighbor export, /ip neighbor discovery export, etc, don’t work properly.

[jmaslak@edge2.foo1] /ip neighbor discovery> print
Flags: X - disabled
 #   NAME
 0   ether1
 1 X ether2
 2 X br_ext
 3   br_workstation
 4   lo
[jmaslak@edge2.foo1] /ip neighbor discovery> export
# jul/25/2016 01:45:45 by RouterOS 6.35.4
# software id =
#
[jmaslak@edge2.foo1] /ip neighbor discovery>

In this case, the export should have contained entries for the two disabled interfaces.

Ip neighbor discovery interface settings are treated a bit different from other settings.
When you do just a /export you will find several /ip neighbor discovery sections scattered
over the entire file, each after a certain category of interfaces has been defined.
Apparently this means it is not possible to export the settings from the /ip neighbor discovery
command itself, but only as part of the entire config. You can do a /export and look for the
appropriate settings.