NGX_HTTP_SSI_ECHO_VAR  240 http/modules/ngx_http_ssi_filter_module.c     { ngx_string("var"), NGX_HTTP_SSI_ECHO_VAR, 1, 0 },
NGX_HTTP_SSI_ECHO_VAR 2106 http/modules/ngx_http_ssi_filter_module.c     var = params[NGX_HTTP_SSI_ECHO_VAR];