Obsolete old ntp binaries
Revert "Fix #3350. Do not destroy an interface when it's being disabled"

Ermal reported issues when changes are made on VLAN parent interface
with this patch. He did other changes and interface_configure() will now
be able to re-create VLAN interface

This reverts commit f70a140fe18cb80012e53f82c268788fbcae5436.
Fix typo on variable name
Do not list the same CARP ip as an option for Interface