Add debugging messages.

babel.c

@@ -706,6 +706,8 @@ expire_routes(void)
 {
     int i;
 
+    debugf("Expiring old routes.\n");
+
     for(i = 0; i < numneighs; i++) {
         if(neighs[i].id[0] == 0)
             continue;

xroute.c

@@ -31,6 +31,7 @@ THE SOFTWARE.
 #include "neighbour.h"
 #include "route.h"
 #include "xroute.h"
+#include "util.h"
 
 struct xroute xroutes[MAXXROUTES];
 int numxroutes = 0;
@@ -325,6 +326,8 @@ check_myxroutes()
     int i, j, n, change;
     struct kernel_route routes[120];
 
+    debugf("Checking kernel routes.\n");
+
     n = -1;
     for(i = 0; i < nummyxroutes; i++)
         if(myxroutes[i].installed < 2)