Allocating AF constants for vendors.

[Alfred Perlstein]

Hello all,

I would like to reserve about 64 entries for VENDOR specific address
families in sys/socket.h.

I think this will allow vendors to comfortably use the array of
address families without worrying about overlap with FreeBSD
protocols.

If no one objects I plan to commit this in the next few days.

The format will be along the lines of:

AF_VENDOR0 -> AF_VENDOR63

Suggestions?

thank you,
-- 
- Alfred Perlstein