bgpd: code cleanup

* bgpd/bgp_aspath.c
  * ashash: only used in one file, make static
  * aspath_count_numas(): dead code, sayonara
* bgpd/bgpd.c
  * peer_nsf_stop(): only used in one file, make static
* bgpd/bgp_packet.h
  * bgp_capability_receive(): add missing prototype for a
    global function
diff --git a/bgpd/bgp_aspath.c b/bgpd/bgp_aspath.c
index 3c8032f..a9602d9 100644
--- a/bgpd/bgp_aspath.c
+++ b/bgpd/bgp_aspath.c
@@ -86,7 +86,7 @@
 };
 
 /* Hash for aspath.  This is the top level structure of AS path. */
-struct hash *ashash;
+static struct hash *ashash;
 
 /* Stream for SNMP. See aspath_snmp_pathseg */
 static struct stream *snmp_stream;
@@ -501,22 +501,6 @@
   return 0;
 }
 
-/* Return number of as numbers in in path */
-unsigned int
-aspath_count_numas (struct aspath *aspath)
-{
-  struct assegment *seg = aspath->segments;
-  unsigned int num;
-  
-  num=0;
-  while (seg)
-    {
-      num += seg->length;
-      seg = seg->next;
-    }
-  return num;
-}
-
 /* Convert aspath structure to string expression. */
 static char *
 aspath_make_str_count (struct aspath *as)