Merge pull request #18447 from donaldsharp/bgp_clear_batch

Bgp clear batch

diff --cc bgpd/bgp_fsm.c
Simple merge

diff --cc bgpd/bgp_packet.c
Simple merge

diff --cc bgpd/bgp_route.c
Simple merge

diff --cc bgpd/bgpd.c
Simple merge

diff --cc bgpd/bgpd.h
Simple merge