vars_lengths     2474 http/modules/ngx_http_proxy_module.c     ngx_array_t                *vars_lengths, *vars_values;
vars_lengths     2569 http/modules/ngx_http_proxy_module.c     vars_lengths = NULL;
vars_lengths     2574 http/modules/ngx_http_proxy_module.c     sc.lengths = &vars_lengths;
vars_lengths     2585 http/modules/ngx_http_proxy_module.c     pr->replacement.vars.lengths = vars_lengths->elts;