Make llGetLinkPrimitiveParams() and llGetPrimitiveParams() work for avatars in a linkset.

llGetPrimitiveParams() works through PRIM_LINK_TARGET
Setting via llSetLinkPrimitiveParams(), etc. not yet implemented
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim