Small configure diff to use pflog header from host

[Max Laier <max () love2party net>]

Hi,

the attached makes libpcap and tcpdump use pfvar.h/if_pflog.h from the 
host system (if available) - which is what most people will want[*].  
Tested with OpenBSD 4.1 and FreeBSD where I'm in the progress of doing an 
update to pf which will break the header format - hence the interest in 
this.

Is this something that can be included?  Thanks in advance.

[*] While pflog pcap files have their use too, it's not that helpful 
either as the header format is different everywhere anyhow.  So people 
who need to look at pcaps at a different host need to jump through hoops 
already.  I can also submit an update for pf.h, but that would break 
backward compat.  Also, NetBSD and DragonflyBSD are using the even older 
format still - afaik.  So this is broken already.

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Attachment: libpcap.patch
Description:

Attachment: tcpdump.patch
Description:

Attachment: _bin
Description: