2000-05-21  Michael Natterer  <mitch@gimp.org>

	These changes enable help support for 3rd party plug-ins which
	install their help files outside GIMP's main help dir.

	Instead of calling gimp_help(), gimp_plugin_help_func() etc.,
	all help callbacks now have to call gimp_standard_help_func()
	which has different implementations in the app and in libgimp.

	There is a new function gimp_plugin_help_register() which can
	be called during plug-in query. plug_in.c keeps a list of
	executable_name/help_path pairs. Plug-ins have to pass their
	exec. name to gimp_help() which uses the list to find the plug-in's
	help directory.

	* app/gimphelp.[ch]: gimp_help() now takes a help_path parameter.
	help_path == NULL means the standard help directory. Various
	changes to pass the help_path to the help browser.

	* app/gimprc.c: save the plug-in's help_path in the pluginrc file.

	* app/menus.c: ugly hack to enable help_paths in the "F1" callback.

	* app/plug_in.[ch]: many help_path related changes. Use g_basename()
	instead of strrchr(str,G_DIR_SEPARATOR), cosmetic cleanups.

	* app/internal_procs.c
	* app/gimphelp_cmds.c
	* tools/pdbgen/pdb/gimphelp.pdb: new procedure
	gimp_plugin_help_register(). gimp_help() takes a second parameter
	which is the executable name (not the help_path).

	* app/color_notebook.c
	* app/commands.c
	* app/lc_dialog.c
	* app/preferences_dialog.c
	* app/tools.c: call gimp_standard_help_func() instead of gimp_help().

	* libgimp/gimp.c: new function gimp_get_progname() which returns
	the full path of the plug-in's executable.

	* libgimp/gimp.h: export the new function,
	removed gimp_plugin_help_func(), gimp_help() takes the executable
	name as second parameter.

	* libgimp/gimpcompat.h: added gimp_plugin_help_func().

	* libgimp/gimphelp.c: a wrapper for gimp_plugin_help_register(),
	changed the calls to gimp_help.

	* libgimp/gimphelpui.[ch]: call gimp_standard_help_func() instead
	of gimp_help().

	* plug-ins/helpbrowser/helpbrowser.c: now called with an additional
	help_path parameter. Various changes to enable
	help_path != gimp_standard_help_path.

	Unrelated stuff:

	* app/batch.h: added missing GPL header.

	* app/gimpunit.c: had a LGPL header, merged some fprintf's into
	one call.

	* app/procedural_db.[ch]: cosmetic: g* types, s/g_malloc/g_new/,
	prototypes, indentation.

	* app/resize.c: use less packing widgets. didn't find the "offset"
	redraw bug :(