Fix PMTU discovery in IPsec case by using an MTU hint in ICMP unreachable fragmentation needed other then 0 when we cannot get a security policy. This changes the code path to match what we have had in HEAD since rev. 1.312.
Fix PMTU discovery in IPsec case by using an MTU hint in ICMP unreachable
fragmentation needed other then 0 when we cannot get a security policy.
This changes the code path to match what we have had in HEAD since
rev. 1.312.

PR:		kern/91412
Submitted by:	Tom Judge <tom tomjudge.com>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase