ldirectord: add a support of "netmask" directive for IPv6
ldirectord: add a support of "netmask" directive for IPv6

Signed-off-by: Simon Horman <a105fd58f578dea0be108941d4c59d15396e1855@verge.net.au>

stevenraspudic/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,asp24/resource-agents