NGX_HTTP_IMS_EXACT  113 http/modules/ngx_http_not_modified_filter_module.c         if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT
NGX_HTTP_IMS_EXACT  130 http/ngx_http_core_module.c     { ngx_string("exact"), NGX_HTTP_IMS_EXACT },
NGX_HTTP_IMS_EXACT 3303 http/ngx_http_core_module.c                               NGX_HTTP_IMS_EXACT);