From: Neil Horman <nhorman@tuxdriver.com>
Date: Tue, 3 Jan 2012 14:45:59 -0500

Because of the above, we can compeltely ignore the manual address add path as
far as the optimistic path is concerned.  Since we only call addrconf_prefix_rcv
(where we add the SLAAC address), from ndisc_router_discovery (where we receive
the new router advertisement, and parse its options), I think we can just
augment addrconf_prefix_rcv with an extra parameter (a bool flag), which is set
or cleared based on the value of the ND_OPT_SOURCE_LL_ADDR option in the ndopts
array.  addrconf_prefix_rcv can use that flag to set or clear the optimistic
flag.

Thoughts?

Sounds perfect, thanks Neil.