The Wiki includes a page for the WIDE-DHCPv6 client. Please, mind me if I am wrong, but I cannot find that package in the OpenWrt distribution anymore. @jow once restored back that Wiki page in the year 2015. Perhaps, he can comment.
Remove that page because its package is gone.
Over the weekend, I was about to understand the DHCPv6 client in OpenWrt. I even had to look into its source code and file issue reports. At the start, that particular Wiki page confused me a lot (put me in the wrong direction) because I thought it is the default DHCPv6 client
odhcp6c of OpenWrt; especially because that is the first hit in search engines like DuckDuckGo and a prominent hit in Google.