net/libpcap: Fix build

Fix build issues since if_pflog.h added a net/bpf.h include

Obtained from:	https://github.com/the-tcpdump-group/libpcap/pull/1074
Sponsored by:	Rubicon Communications, LLC ("Netgate")

net/libpcap/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	libpcap
 PORTVERSION=	1.10.1
+PORTREVISION=	1
 CATEGORIES=	net
 MASTER_SITES=	http://www.tcpdump.org/release/
 

net/libpcap/files/patch-gencode.c

@@ -0,0 +1,20 @@
+--- gencode.c.orig	2021-06-07 20:21:35 UTC
++++ gencode.c
+@@ -59,10 +59,16 @@
+ #include <sys/socket.h>
+ #include <net/if.h>
+ #include <net/pfvar.h>
+-#include <net/if_pflog.h>
+ #endif /* HAVE_NET_PFVAR_H */
+ 
+ #include "pcap-int.h"
++
++#ifdef HAVE_NET_PFVAR_H
++/* FreeBSD includes <net/bpf.h> from <net/if_pflog.h>, and indirectly includes
++ * <net/dlt.h>. The FreeBSD version lacks DLT_IEEE802_15_4_TAP, so we really
++ * want to use our own version. */
++#include <net/if_pflog.h>
++#endif /* HAVE_NET_PFVAR_H */
+ 
+ #include "extract.h"
+ 

net/libpcap/files/patch-pcap_bpf.h

@@ -0,0 +1,13 @@
+--- pcap/bpf.h.orig	2021-06-07 20:21:35 UTC
++++ pcap/bpf.h
+@@ -78,6 +78,10 @@
+  */
+ #if !defined(_NET_BPF_H_) && !defined(_NET_BPF_H_INCLUDED) && !defined(_BPF_H_) && !defined(_H_BPF) && !defined(lib_pcap_bpf_h)
+ #define lib_pcap_bpf_h
++#define _NET_BPF_H_
++#define _NET_BPF_H_INCLUDED
++#define _BPF_H_
++#define _H_BPF
+ 
+ #include <pcap/funcattrs.h>
+