anchor.diff:  address_family_footer
   :
      (
  -      EXIT_ADDRESS_FAMILY NEWLINE
  +      (
  +         EXIT_ADDRESS_FAMILY
  +         | EXIT
  +      ) NEWLINE
      )?
   ;
   
  
positive.code:    | network_bgp_tail
     | network6_bgp_tail
     | next_hop_self_bgp_tail
     | null_bgp_tail
     | prefix_list_bgp_tail
     | redistribute_aggregate_bgp_tail
  
negative.code:          | peergroup = ~( IP_ADDRESS | IPV6_ADDRESS | NEWLINE )
        ) NO SHUTDOWN NEWLINE
     )
  ;
  
  no_network_bgp_tail
  :
     NO NETWORK ~NEWLINE* NEWLINE
  ;
  
  no_redistribute_connected_rb_stanza
  