This is the 0.5.3 release of VPNC with some modifications: * Adds ability to answer XAuth questions with an external script * Adds cleanup routines that run in the event of an unexpected disconnection * Adds workaround for scenario where concentrator asks Xauth question as a password request. * Adds Mihai Maties' patch for Dead Peer Detection (http://lists.unix-ag.uni-kl.de/pipermail/vpnc-devel/2010-December/003492.html)