Some IPv6 UDP members were incorrectly marked in ERROR status because of
a formatting issue between the keepalived configuration file and the
ipvsadm output. Both are used to compute the state of the members and
when a member's address contained '*:0:*', parsing was incorrect. Now
the health message generation function uses only the compressed IPv6
notation instead of mixing notations.
(cherry picked from commit e5f9f6708c70313bd7e0c570f3541c0afb7fc09c)