free_connection_n  740 core/ngx_connection.c     ngx_cycle->free_connection_n--;
free_connection_n  785 core/ngx_connection.c     ngx_cycle->free_connection_n++;
free_connection_n   45 core/ngx_cycle.h     ngx_uint_t                free_connection_n;
free_connection_n  731 event/ngx_event.c     cycle->free_connection_n = cycle->connection_n;
free_connection_n  107 event/ngx_event_accept.c                               - ngx_cycle->free_connection_n;