[Differential] [Updated] D1893: Fix special case in ip_fragment() to produce a more sensible chain of packets

[glebius (Gleb Smirnoff)]

glebius added a reviewer: ken.
glebius added a comment.

This is Ken's code, we probably want him to look at. Looks like a remnant from zero copy era.

REVISION DETAIL
  https://reviews.freebsd.org/D1893

To: hselasky, pluknet, ae, np, melifaro, glebius, hrs, wollman, bryanv, rpaulo, adrian, bz, gnn, hiren, rwatson, ken
Cc: freebsd-net