avoid memory leak. bzero() after malloc(). (sync from kame)
(sync with latest kame code)
(sync with KAME, for possible security reasons)
rip6query: RIPng query (similar to ripquery) NOTE: we usually do not run route6d on end nodes at startup (rtsol should do the trick). So I figured that route6d can be in /usr/sbin, not in /sbin (routed is in /sbin). Correct me if I'm wrong.