VAR_EDNS_TCP_KEEPALIVE
{ YDVAR(1, VAR_EDNS_TCP_KEEPALIVE) }
server_tcp_keepalive: VAR_EDNS_TCP_KEEPALIVE STRING_ARG
%token VAR_EDNS_TCP_KEEPALIVE VAR_EDNS_TCP_KEEPALIVE_TIMEOUT
server_tcp_keepalive: VAR_EDNS_TCP_KEEPALIVE STRING_ARG
%token VAR_EDNS_TCP_KEEPALIVE VAR_EDNS_TCP_KEEPALIVE_TIMEOUT