reorder includes to fix build on OpenBSD (#3663, patch by Jonathan Gray)

code/qcommon/net_ip.c

@@ -59,9 +59,9 @@ static qboolean	winsockInitialized = qfalse;
 #include <errno.h>
 #include <netdb.h>
 #include <netinet/in.h>
+#include <sys/socket.h>
 #include <net/if.h>
 #include <sys/ioctl.h>
-#include <sys/socket.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <unistd.h>