Depending on the binary name of the agent either NXAgent
  or X2GoAgent is set as WM_Class.

  This is needed for some window managers (like the one shipped with
  Maemo)

  The original WM_CLASS patch has been taken from the FreeNX patch
  series, author unknown.

  The nxagent/x2goagent has been done by the X2Go Project, author
  see below.