ngx_send_chain_pt  116 core/ngx_connection.h     ngx_send_chain_pt   send_chain;
ngx_send_chain_pt   21 os/unix/ngx_os.h typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
ngx_send_chain_pt   29 os/unix/ngx_os.h     ngx_send_chain_pt  send_chain;