Add ddnsforcehostname option to DHCP6 Server configuration editor
(cherry picked from commit 1a6bda5b389df05d6dac024e8445d3a00e01e823)
Add ddnsforcehostname option to DHCP6 Server configuration editor
(cherry picked from commit 1a6bda5b389df05d6dac024e8445d3a00e01e823)