fix: handle 401 and 403 by external auth (#9131)

Author: johanneswuerbach

rootfs/etc/nginx/template/nginx.tmpl

@@ -957,7 +957,7 @@ stream {
         set $proxy_upstream_name "-";
 
         {{ if not ( empty $server.CertificateAuth.MatchCN ) }}
-        {{ if gt (len $server.CertificateAuth.MatchCN) 0 }}  
+        {{ if gt (len $server.CertificateAuth.MatchCN) 0 }}
         if ( $ssl_client_s_dn !~ {{ $server.CertificateAuth.MatchCN }} ) {
             return 403 "client certificate unauthorized";
         }
@@ -1288,7 +1288,7 @@ stream {
                     {{- end }}
                     return
                 end
-                if res.status == ngx.HTTP_FORBIDDEN then
+                if res.status == ngx.HTTP_UNAUTHORIZED or res.status == ngx.HTTP_FORBIDDEN then
                     ngx.exit(res.status)
                 end
                 ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)