Disable authentication for license files

We want to have a where the client, for example SUSEConnect, can display
license information to the user prior to registering a specific module or
product. With the intend to have this display prior to registration
the license file to be displayed cannot be in a path that requires
authentication. Update the nginx configuration for Public Cloud setup to
skip authentication for the license path.

package/files/nginx-pubcloud/nginx-https.conf

@@ -22,6 +22,12 @@ server {
         autoindex off;
     }
 
+    # no authentication for license files
+    location ~ ^.*/product.license/.*$ {
+        autoindex on;
+        log_not_found off;
+    }
+
     location /repo {
         autoindex on;
         log_not_found off;