allow to use $uid_got in SSI and perl module

src/http/modules/ngx_http_userid_filter_module.c

diff --git a/src/http/modules/ngx_http_userid_filter_module.c b/src/http/modules/ngx_http_userid_filter_module.c
index 03efd3a..17f0193 100644
--- a/src/http/modules/ngx_http_userid_filter_module.c
+++ b/src/http/modules/ngx_http_userid_filter_module.c
@@ -543,7 +543,7 @@
 {
     ngx_http_variable_t  *var;
 
-    var = ngx_http_add_variable(cf, &ngx_http_userid_got, NGX_HTTP_VAR_NOHASH);
+    var = ngx_http_add_variable(cf, &ngx_http_userid_got, 0);
     if (var == NULL) {
         return NGX_ERROR;
     }