grep -C10 zero_in_uri /usr/local/rvm/gems/ruby-2.1.1/gems/passenger-4.0.41/ext/nginx/StaticContentHandler.c
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
return NGX_HTTP_NOT_ALLOWED;
}

if (r->uri.data[r->uri.len - 1] == '/') {
return NGX_DECLINED;
}

#if (PASSENGER_NGINX_MINOR_VERSION == 8 && PASSENGER_NGINX_MICRO_VERSION < 38) || \
(PASSENGER_NGINX_MINOR_VERSION == 7 && PASSENGER_NGINX_MICRO_VERSION < 66)
if (r->zero_in_uri) {
return NGX_DECLINED;
}
#endif

log = r->connection->log;

ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http filename: \"%s\"", filename->data);

clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);