$ua->requests_redirectable
$ua->requests_redirectable( \@requests )
    This reads or sets the object’s list of request names that
    "$ua->redirect_ok(...)" will allow redirection for.  By default,
    this is "[’GET’, ’HEAD’]", as per RFC 2616.  To change to include
    ’POST’, consider:

       push @{ $ua->requests_redirectable }, ’POST’;