Port udp plugin to win32 (#345288).

Original commit message from CVS:
Based on patch by: Joni Valtanen  <joni dot valtanen at movial fi>
* configure.ac:
* gst/udp/Makefile.am:
* gst/udp/gstdynudpsink.c: (gst_dynudpsink_init),
(gst_dynudpsink_finalize), (gst_dynudpsink_close):
* gst/udp/gstdynudpsink.h:
* gst/udp/gstmultiudpsink.c: (gst_multiudpsink_init),
(gst_multiudpsink_finalize), (gst_multiudpsink_close):
* gst/udp/gstmultiudpsink.h:
* gst/udp/gstudp.c: (plugin_init):
* gst/udp/gstudpsink.h:
* gst/udp/gstudpsrc.c: (gst_udpsrc_init), (gst_udpsrc_create),
(gst_udpsrc_start), (gst_udpsrc_stop):
* gst/udp/gstudpsrc.h:
* gst/udp/gstudpnetutils.c: (gst_udp_net_utils_win32_inet_aton),
(gst_udp_net_utils_win32_wsa_startup):
* gst/udp/gstudpnetutils.h:
Port udp plugin to win32 (#345288).
diff --git a/gst/udp/gstudpsink.h b/gst/udp/gstudpsink.h
index 0270b50..f6d95e9 100644
--- a/gst/udp/gstudpsink.h
+++ b/gst/udp/gstudpsink.h
@@ -31,15 +31,9 @@
 #include <unistd.h>
 #include <errno.h>
 #include <string.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include <fcntl.h>
-#include <arpa/inet.h>
+
 #include "gstudp.h"
+#include "gstudpnetutils.h"
 
 #define GST_TYPE_UDPSINK                (gst_udpsink_get_type())
 #define GST_UDPSINK(obj)                (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_UDPSINK,GstUDPSink))