added _GNU_SOURCE and limits.h to build against glibc-2.8

src/charon/network/socket-raw.c

@@ -17,6 +17,9 @@
  * $Id$
  */
 
+/* for struct in6_pktinfo */
+#define _GNU_SOURCE
+
 #include <pthread.h>
 #include <sys/types.h>
 #include <sys/socket.h>

src/charon/network/socket.c

@@ -17,6 +17,9 @@
  * $Id$
  */
 
+/* for struct in6_pktinfo */
+#define _GNU_SOURCE
+
 #include <pthread.h>
 #include <sys/types.h>
 #include <sys/socket.h>