Upgrade libpcap to 1.8.1 (Nmap-specific patches not yet applied)

libpcap/gen_version_header.sh

@@ -0,0 +1,19 @@
+#! /bin/sh
+print_version_string()
+{
+	if grep GIT "$1" >/dev/null
+	then
+		read ver <"$1"
+		echo $ver | tr -d '\012'
+		date +_%Y_%m_%d
+	else
+		cat "$1"
+	fi
+}
+if test $# != 3
+then
+	echo "Usage: gen_version_header.sh <version file> <template> <output file>" 1>&2
+	exit 1
+fi
+version_string=`print_version_string "$1"`
+sed "s/%%LIBPCAP_VERSION%%/$version_string/" "$2" >"$3"