when len is inserted back into the synthetic IP packet and cause a multiple of 2^16 bytes of TCP "packet loss". This improves Linux->FreeBSD netperf bandwidth by a factor of 300 in testing on Amazon EC2. Reviewed by: jfv MFC after: 2 weeks
LRO code. Thanks to Andrew Gallatin for the change. MFC after: 7 days
Obtained from: Chelsio Inc. MFC after: 3 days