Do not spam the syslog with DHCPv6 lease info if quietdhcp option
is selected. This already works for DHCPv4, make it work in the same
way for DHCPv6.
Signed-off-by: Arjen de Korte <build+lede@de-korte.org>
[Originally written by Arjen de Korte on GitHub but had issues providing
a SoB in correct format.]
Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>