Merge in6pcb with inpcb and remove inpcb_hdr since that's no longer needed.
Remove #include netinet6/in6_pcb.h.
in_pcb_hdr.h is gone.
in6_pcb.h is gone.
Adapt to in6pcb -> inpcb changes.
Add IN6P_{ATTACHED,BOUND,CONNECTED} for KAME src compatibility.
struct mbuf can be shared between in4p_depend and in6p_depend.
Remove 'inp_options' and 'in6p_options' define.
inpcb_hdr is gone.
<netinet6/in6_pcb.h> went away. Bye!
Adapt to in6pcb -> inpcb changes.
Bye netinet6/in6_pcb.h.
Adapt to in6pcb removal.
in6pcb -> inpcb merge.
in6pcb -> inpcb.
remove in6_pcb.h and include in_pcb.h.
Fix wrong indentation.
Add FreeBSD's locking defines (currently defined to nothing) and a
'struct lock' inside 'struct inpcb'.
sotoinpcb_hdr -> sotoinpcb.
Refactor include style to include in_pcb.h instead of in6_pcb.h when
INET or INET6 are defined.