Fix support for l2tpv3 over ip
Cleanup of unused parted root partitioning starting offset

As we are no longer setting the ROOT_OFFSET based on disk size,
I have removed the ROOT_OFFSET variable and the set_root_fstype
function.
Remove endpoint, and add mtu support
using a DNS server with an IPv6 address.

It seems that immediately the back of an IPv6 address will not be
normally recognized if it is not "\n" when using a DNS server with an
IPv6 address.
collect dhcpv6-options

The "dhcpv6-options" option parameter corrected the bug which is not
reflected normally.
Merge pull request #3 from higebu/fix-support-for-l2tpv3-over-ip

Fix support for l2tpv3 over ip
Merge pull request #4 from hydrajump/install-align-partition

Cleanup of unused parted root partitioning starting offset
Merge pull request #6 from higebu/fix-support-for-l2tpv3

Fix support for l2tpv3
Merge pull request #7 from tea2ka/helium

Correction of a "DHCPv6Client"-related script for use with parameters only SLAAC
Delete SSH blacklists as they are no longer needed

The SSH blacklists were committed 5 years ago and the
original contributor does not recall why they were added.
Merge pull request #8 from hydrajump/delete-ssh-blacklists

Delete SSH blacklists as they are no longer needed
Bug #159: add conf mode templates for dummy interfaces.
Bug #159: add delete action for dummy interfaces.
0.20.43+vyos1+helium2
Bug #159: add dummy type to network interface type list.
Remove extra space before pppoe in interface types for nicer formatting.
Bug #170: add L2TPv3 to the interface type list.
0.20.43+vyos1+helium3
Add system option for ctrl-alt-del-action to configuration

This new configuration option allows the user to specify
what action to take on ctrl-alt-delete: disable, reboot
or poweroff. By default ctrl-alt-delete-action is set
to disable.

The ctrl-alt-delete action is configured in /etc/inittab.
Use elif conditional instead of if