Log Message:
Update "rdesktop" package to version 1.6.0. Changes since 1.5.0:
* Fix for potential vulnerability against compromised/malicious
  servers (reported by iDefense)
* Fix for crash with recent versions of X.Org
* Fix for connection to Windows 2008 Server
* ALSA driver added
* Sound drivers can now be selected at runtime
* Smartcard support (Alexi Volkov <alexi@my...>)
* Send physical mouse buttons rather than logical ones

The security fixes had already been integrated into "pkgsrc" as patches.