Put 6LoWPAN border router in its own module

Makefile.dep

@@ -79,6 +79,12 @@ ifneq (,$(filter destiny,$(USEMODULE)))
 	endif
 endif
 
+ifneq (,$(filter sixlowborder,$(USEMODULE)))
+	ifeq (,$(filter sixlowpan,$(USEMODULE)))
+		USEMODULE += sixlowpan
+	endif
+endif
+
 ifneq (,$(filter sixlowpan,$(USEMODULE)))
 	ifeq (,$(filter ieee802154,$(USEMODULE)))
 		USEMODULE += ieee802154

sys/Makefile

@@ -57,6 +57,9 @@ endif
 ifneq (,$(filter sixlowpan,$(USEMODULE)))
     DIRS += net/network_layer/sixlowpan
 endif
+ifneq (,$(filter sixlowborder,$(USEMODULE)))
+    DIRS += net/network_layer/sixlowpan/border
+endif
 ifneq (,$(filter rpl,$(USEMODULE)))
     DIRS += net/routing/rpl
 endif

sys/net/network_layer/sixlowpan/lowpan.c

@@ -36,7 +36,9 @@
 #include "sixlowpan/ndp.h"
 
 #include "lowpan.h"
-#include "border.h"
+#ifdef MODULE_SIXLOWBORDER
+#include "border/border.h"
+#endif
 #include "ip.h"
 #include "icmp.h"