[FS#322] LAN doesn't get the ipv6 address when WAN6 uses DHCPv6

[LEDE Bugs]

The following task has a new comment added:

FS#322 - LAN doesn't get the ipv6 address when WAN6 uses DHCPv6
User who did this - Mathias Kresin (mkresin)

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> my computer can get a IPv6 address by setting "Interfaces - LAN"-"DHCP Server"-"DHCP Server" to "relay mode" on OpenWrt CC.

Yeah, my crystal ball failed to tell me what configuration you are using...
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=322#comment1003