Sync bgpd and ripd set_metric_addsub_cmd commands. Fixes bugzilla #192.
[backport candidate]
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c
index 6c10987..d8944ef 100644
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -2853,7 +2853,7 @@
        "set metric <+/-metric>",
        SET_STR
        "Metric value for destination routing protocol\n"
-       "Add or subtract BGP metric\n")
+       "Add or subtract metric\n")
 
 DEFUN (no_set_metric,
        no_set_metric_cmd,