bz 7b0a0ba0e1 Implement UDP control block support.
So far the udp_tun_func_t had been (ab)using inp_ppcb for udp in kernel
tunneling callbacks.  Move that into the udpcb and add a field for flags
there to be used by upcoming changes instead of sticking udp only flags
into in_pcb flags2.

Bump __FreeBSD_version for ports to detect it and because of vnet* struct
size changes.

Submitted by:	jhb (7.x version)
Reviewed by:	rwatson
2009-05-23 16:51:13 +00:00
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