add the 1:1 call to `send_http_response` to the error handling for bytes_in_flight so callers do not have to.  eliminate dead code that resulted from the change
add the 1:1 call to `send_http_response` to the error handling for bytes_in_flight so callers do not have to.  eliminate dead code that resulted from the change

EOSIO/eos,EOSIO/eos,EOSIO/eos,EOSIO/eos,EOSIO/eos