zebra: Update news with the status of link-detect and the global default
diff --git a/NEWS b/NEWS
index 155b25c..6db831e 100644
--- a/NEWS
+++ b/NEWS
@@ -2,9 +2,23 @@
 
 * Changes in Quagga []
 
-- [zebra] "no link-detect" is no longer the default.  To retain current
-    behavior save your config before updating, else remove it from
-    you config prior to update.
+- [zebra] "no link-detect" is no longer the default.  
+
+    The previous release of Quagga always explicitly writes-out the
+    link-detect configuration state.  Therefore, to retain current behavior
+    save your config with the prior release before updating.
+
+    Otherwise, review your configuration.  Note, most users will generally
+    want to have link-detect enabled, and so can just remove 'no
+    link-detect' from their interface configuration.
+
+    This release also adds a global configuration to specify the default,
+    which can be specified in the zebra configuration as:
+
+      default link-detect (on|off)
+
+    This will then apply to any interface which does not have link-detect
+    explicitly configured.
 
 * Changes in Quagga 0.99.24