idle              154 core/ngx_connection.h     unsigned            idle:1;
idle             2596 http/ngx_http_request.c     c->idle = 1;
idle             2706 http/ngx_http_request.c     c->idle = 0;
idle              784 os/unix/ngx_process_cycle.c                 if (c[i].fd != -1 && c[i].idle) {