Include headers for macosx

mud.c

@@ -11,9 +11,13 @@
 #include <sys/socket.h>
 #include <sys/time.h>
 #include <net/if.h>
-#include <netinet/in.h>
 #include <ifaddrs.h>
 
+#ifdef __APPLE__
+#include <netinet/in.h>
+#include <netinet6/in6.h>
+#endif
+
 #include <sodium.h>
 
 #define MUD_ASSERT(X) (void)sizeof(char[(X)?1:-1])