[bgpd] Avoid zombie accepted peer entries

Currently, when accepting the connection, it can be left as zombie, when the
peer just initiates a connection, but never sends data (and the TCP
connection end packets are lost).  This happens because for accepted
connections a temporary new peer entry is created until OPEN message is
exchanged, and this temporary peer entry does not get the hold time
parameter set at all.

* bgp_network.c: (bgp_accept) Set hold time and keepalive values for ACCEPT
  peers.
diff --git a/bgpd/bgp_network.c b/bgpd/bgp_network.c
index aa019be..7784700 100644
--- a/bgpd/bgp_network.c
+++ b/bgpd/bgp_network.c
@@ -185,6 +185,8 @@
     peer->fd = bgp_sock;
     peer->status = Active;
     peer->local_id = peer1->local_id;
+    peer->v_holdtime = peer1->v_holdtime;
+    peer->v_keepalive = peer1->v_keepalive;
 
     /* Make peer's address string. */
     sockunion2str (&su, buf, SU_ADDRSTRLEN);