ngx_http_clean_header  547 http/modules/ngx_http_image_filter_module.c     ngx_http_clean_header(r);
ngx_http_clean_header  124 http/ngx_http.h void ngx_http_clean_header(ngx_http_request_t *r);
ngx_http_clean_header  475 http/ngx_http_special_response.c     ngx_http_clean_header(r);