The <b>strongSwan Root CA</b> constrains the path length to <b>one</b> intermediate CA
but the <b>Research CA</b> creates a subsidiary <b>Duck Research CA</b> which in turn
issues an end entity certificate to roadwarrior <b>carol</b> so that the total
path length becomes <b>two</b>. This is detected by gateway <b>moon</b> which aborts
the negotiation.
