dhcp: T9278: define logmsg() for the DHCPv6 client script

dhcp6c-script.j2 calls logmsg() six times but runs standalone under dhcp6c. It
never sources dhclient-enter-hooks.d/01-vyos-logging, which is only pulled into
the dhclient-script shell, and defines no logmsg() itself, so every call failed
with "logmsg: not found" while adding shell errors to the journal.

Carry a POSIX sh copy using the same tag, priorities and /tmp/vyos.dhclient.debug
gate as the DHCPv4 hooks. The two messages announcing an internal step log at
debug; the nameserver and search domain updates stay at info.

0 files changed, 0 insertions, 0 deletions