Fix some build issues on Haiku.

Link with two additional libraries if required.  Do not include
<netinet/if_ether.h>, which does not exist, and which the source does
not require to compile.  These changes allow tcpreplay to build on
Haiku hrev57588 as follows:

./configure --with-libpcap=/path/to/libpcap/ --enable-static-link

However, since Haiku ports do not have GNU AutoGen, the master branch
would need some files either copied from the 4.4.4 release tarball or
generated on a Linux host.  Even after the build completes, tcpreplay
is still not entirely functional because libpcap on Haiku does not
implement pcap_inject() and tcpreplay fails to handle Haiku interfaces
correctly:

> ./src/tcpreplay --listnics
Available network interfaces:
/dev/net/ipro1000/1
vale:/dev/net/ipro1000/1
netmap:/dev/net/ipro1000/1
/dev/net/ipro1000/0
vale:/dev/net/ipro1000/0
netmap:/dev/net/ipro1000/0
> ./src/tcpreplay -i /dev/net/ipro1000/1 icmp-echoreply.pcap

Fatal Error: failed to open device /dev/net/ipro1000/1: error opening
  khial device: Device/File/Resource busy

So proper Haiku support would require some more work.

configure.ac

@@ -605,23 +605,49 @@ else
 fi
 
 dnl Check for inet_aton and inet_pton
+dnl On Haiku these functions are in libnetwork.
 AC_CHECK_FUNC(inet_aton,
     AC_DEFINE([HAVE_INET_ATON], [1], [Do we have inet_aton?])
     inet_aton=yes,
-    inet_aton=no)
+    [
+        AC_CHECK_LIB(network, inet_aton,
+            AC_DEFINE([HAVE_INET_ATON], [1], [Do we have inet_aton?])
+            use_libnetwork=yes,
+            [inet_aton=no]
+        )
+    ]
+)
 AC_CHECK_FUNC(inet_pton,
     AC_DEFINE([HAVE_INET_PTON], [1], [Do we have inet_pton?])
     inet_pton=yes,
-    inet_pton=no)
+    [
+        AC_CHECK_LIB(network, inet_pton,
+            AC_DEFINE([HAVE_INET_PTON], [1], [Do we have inet_pton?])
+            use_libnetwork=yes,
+            [inet_pton=no]
+        )
+    ]
+)
 AC_CHECK_FUNC(inet_ntop,
     AC_DEFINE([HAVE_INET_NTOP], [1], [Do we have inet_ntop?])
     inet_ntop=yes,
-    inet_ntop=no)
+    [
+        AC_CHECK_LIB(network, inet_ntop,
+            AC_DEFINE([HAVE_INET_NTOP], [1], [Do we have inet_ntop?])
+            use_libnetwork=yes,
+            [inet_ntop=no]
+        )
+    ]
+)
 
 if test "$inet_ntop" = "no" -a "$inet_pton" = "no" ; then
     AC_MSG_ERROR([We need either inet_ntop or inet_pton])
 fi
 
+if test "$use_libnetwork" = "yes" ; then
+	LIBS="-lnetwork $LIBS"
+fi
+
 AC_CHECK_FUNC(inet_addr,
     AC_DEFINE([HAVE_INET_ADDR], [1], [Do we have inet_addr?])
     inet_addr=yes,
@@ -631,6 +657,9 @@ if test x$inet_addr = xno ; then
     AC_MSG_ERROR([We need inet_addr.  See bug 26])
 fi
 
+dnl On Haiku fts_*() functions are in libbsd.
+AC_CHECK_FUNC(fts_read,,[AC_CHECK_LIB(bsd, fts_read)])
+
 dnl #####################################################
 dnl Checks for tuntap device support
 dnl #####################################################

src/common/sendpacket.h

@@ -26,7 +26,7 @@
 
 #ifdef __NetBSD__
 #include <net/if_ether.h>
-#else
+#elif ! defined(__HAIKU__)
 #include <netinet/if_ether.h>
 #endif