babeld: babelz merge.

Babelz is the last version of the stand-alone babel daemon. In
particular, it use multiple channels to diminuate
interferences. Please refer to this one for more details.
diff --git a/babeld/babel_main.c b/babeld/babel_main.c
index 159ba65..4d6f60e 100644
--- a/babeld/babel_main.c
+++ b/babeld/babel_main.c
@@ -482,7 +482,7 @@
 
     /* Uninstall and flush all routes. */
     debugf(BABEL_DEBUG_COMMON, "Uninstall routes.");
-    babel_uninstall_all_routes();
+    flush_all_routes();
     babel_interface_close_all();
     babel_zebra_close_connexion();
     babel_save_state_file();