separate patches.
multicast support changed in 0.99.20 and not fully tested, no response to
my ports@ call for testing, so if this breaks things send me a mail with
details.
CVE-2011-3323: ospf6d *stack-based buffer overflow*, inter-area-prefix LSAs
CVE-2011-3324: ospf6d assertion failure; DD LSAs with over-length header
CVE-2011-3325: ospf crash(?) if a hello has a truncated header or invalid type
CVE-2011-3326: ospf null deref if a link state update LSA has an unknown type
CVE-2011-3327: bgp buffer overflow with malformed UPDATE (extended communities)
