FS#829 - network.sh incorrectly hardcodes IPv6 address suffix

[openwrt-bot]

jow-:

The current implementation of network_get_ipaddr6() and network_get_ipaddrs6() in /lib/function/network.sh incorrectly assumes ":1" as suffix for the local IPv6 address allocated from the delegated prefix.

The effective local address should be taken from the "local-address" field instead.

[openwrt-bot]

jow-:

Fixed with http://git.lede-project.org/7f91cabd0d (master) and http://git.lede-project.org/df4363b607 (lede-17.01)