Bug#791582: Multiplication of IPv6 addresses

[Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>]

Package: dhcpcd5
version: 6.9.0-1

I'm running dhcpcd with the ifup/ifdown scripts on a network that does
DHCPv6.  net.ipv6.conf.wlan0.use_tempaddr is set to 2.

I'm getting 5 global addresses instead of the expected 2 (the weird prefix
is a ULA):

    $ ip -6 addr show wlan0
    3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
        inet6 fd7f:ba99:411e:21::940/128 scope global noprefixroute dynamic 
           valid_lft 542sec preferred_lft 242sec
        inet6 fd7f:ba99:411e:21:14c7:dd27:4dbb:7e24/64 scope global temporary dynamic 
           valid_lft 542sec preferred_lft 242sec
        inet6 fd7f:ba99:411e:21:906d:67a2:2656:c66d/64 scope global mngtmpaddr noprefixroute dynamic 
           valid_lft 542sec preferred_lft 242sec
        inet6 fd7f:ba99:411e:21:9b1:36f:85c1:8517/64 scope global temporary dynamic 
           valid_lft 542sec preferred_lft 242sec
        inet6 fd7f:ba99:411e:21:25fc:ea8e:91be:1567/64 scope global mngtmpaddr noprefixroute dynamic 
           valid_lft 542sec preferred_lft 242sec
        inet6 fe80::2677:3ff:fe1a:db64/64 scope link 
           valid_lft forever preferred_lft forever

-- Juliusz