[Bug 1940481] [NEW] dhclient.conf should set send DHCPv6 host-name option

[TJ]

Public bug reported:

Despite the fix in 2012 (bug #991360) the default configuration shipped
with isb-dhcp-client /etc/dhclient.conf in 2021 still does not set the
DHCPv6 hostname option by default. All it needs is:

# send host-name with DHCPv6 not just DHCPv4
send fqdn.fqdn = gethostname();

Without this option it causes dhcpy6d's dynamic DNS update (to bind9) to
fail because the hostname is empty.

** Affects: isc-dhcp (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Despite the fix in 2012 (bug #991360) the default configuration shipped
  with isb-dhcp-client /etc/dhclient.conf in 2021 still does not set the
  DHCPv6 hostname option by default. All it needs is:
  
  # send host-name with DHCPv6 not just DHCPv4
  send fqdn.fqdn = gethostname();
  
- With this option it causes dhcpy6d's dynamic DNS update (to bind9) to
+ Without this option it causes dhcpy6d's dynamic DNS update (to bind9) to
  fail because the hostname is empty.

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https://bugs.launchpad.net/bugs/1940481

Title:
  dhclient.conf should set send DHCPv6 host-name option

Status in isc-dhcp package in Ubuntu:
  New

Bug description:
  Despite the fix in 2012 (bug #991360) the default configuration
  shipped with isb-dhcp-client /etc/dhclient.conf in 2021 still does not
  set the DHCPv6 hostname option by default. All it needs is:

  # send host-name with DHCPv6 not just DHCPv4
  send fqdn.fqdn = gethostname();

  Without this option it causes dhcpy6d's dynamic DNS update (to bind9)
  to fail because the hostname is empty.

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