Fix for BSD build (more to come).

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@2563 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/sc2code/libs/network/socket/socket_bsd.c

@@ -31,6 +31,9 @@
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <netdb.h>
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
+#	include <netinet/in_systm.h>
+#endif
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 #include <unistd.h>