2001-01-22  Christoph Spiel  <cspiel@hammersmith-consulting.com>

	* sppcmain.C (usage): added info about how to display help.

	* graph2D.H, opengl.H, postscript.H, sppc.H, writegif.C,
	xv24to8.C [HAVE_CONFIG_H]: added 'config.H'.
