ngx_http_header_filter   14 http/ngx_http_header_filter_module.c static ngx_int_t ngx_http_header_filter(ngx_http_request_t *r);
ngx_http_header_filter  623 http/ngx_http_header_filter_module.c     ngx_http_top_header_filter = ngx_http_header_filter;