Be careful with the shovel (<<) operator. It modifies the object on the

Be careful with the shovel (<<) operator. It modifies the object on the
left hand side. And if that object is just a copy (i.e. reference to) of
another object, bad things like on-the-fly modification of the
orvos_login_base configuration value occur...

This fixes the multiplication of return_to parameters on every call to
the login url.