[CFT/Review] net byte order for AF_INET

[Olivier Cochard-Labbé]

I've done some tests with this net byte ordered(NBO) patch:
- I've compiled 2 i386 images of BSD Router Project (current branch
rev241418): One with the patch, and the other without the patch [1]
- I've run my "full-features testing lab" under VirtualBox [2] using
theses images.

Here are the differences:
- I can't SSH to and between the NBO-patched-FreeBSD;
- Lot's of messages "in_cksum_skip: out of data by 28560/23460" on the
non-patched FreeBSD (R2 and R3 on the diagram in [2])
- PPTP tunnel (net/mpd5) didn't works on the NBO-patched-FreeBSD;

Regards,

Olivier

[1] http://gugus69.free.fr/freebsd/netbyteorder/
[2] http://bsdrp.net/documentation/examples/maximum_bsdrp_features_lab