misc/177785: ipsec-tools 0.8.0 racoon tends to segfault when multiple Phase1's aren't establishing

[Todd Blum]

racoon segfaulted again, but this time without any sainfo messages.

The crash coincided with an ISP outage that affected at least 6 remote
endpoints.  DPD was enabled on these tunnels:

...
May  1 01:18:27 192.168.116.250 racoon: INFO: ISAKMP-SA deleted
my.end.poi.nt[500]-x.x.x.x [500] spi:48131b4e56ac24b8:32ef67f65454935e
May  1 01:18:28 192.168.116.250 racoon: [y.y.y.y ] INFO: DPD: remote
(ISAKMP-SA spi=622012ee7f51261d:7e39cc0f5ee916a0) seems to be dead.
May  1 01:18:28 192.168.116.250 racoon: INFO: purging ISAKMP-SA
spi=622012ee7f51261d:7e39cc0f5ee916a0.
May  1 01:18:28 192.168.116.250 racoon: INFO: purged IPsec-SA
spi=2284023606.
May  1 01:18:28 192.168.116.250 racoon: INFO: purged IPsec-SA spi=187964617.
May  1 01:18:28 192.168.116.250 racoon: INFO: purged ISAKMP-SA
spi=622012ee7f51261d:7e39cc0f5ee916a0.
May  1 01:18:28 192.168.116.250 racoon: INFO: ISAKMP-SA deleted
my.end.poi.nt[500]-y.y.y.y [500] spi:622012ee7f51261d:7e39cc0f5ee916a0
May  1 01:18:29 192.168.116.250 racoon: [z.z.z.z ] INFO: DPD: remote
(ISAKMP-SA spi=3c837090349206bf:1086e896dce5e982) seems to be dead.
May  1 01:18:29 192.168.116.250 racoon: INFO: purging ISAKMP-SA
spi=3c837090349206bf:1086e896dce5e982.
May  1 01:18:29 192.168.116.250 racoon: INFO: purged IPsec-SA
spi=3531119898.
May  1 01:18:29 192.168.116.250 racoon: INFO: purged IPsec-SA spi=124488619.
May  1 01:18:29 192.168.116.250 racoon: INFO: purged ISAKMP-SA
spi=3c837090349206bf:1086e896dce5e982.
...