2001-12-10  Sven Neumann  <sven@gimp.org>

	* app/config/Makefile.am
	* app/config/gimpconfig-substitute.[ch]: new files with code to do
	substitution magic on path strings. Similar to the code in gimprc.c
	but UTF8 safe.

	* app/config/gimpconfig-params.h
	* app/config/gimpbaseconfig.c: added a bunch of convenience macros
	to register config properties and use them for GimpBaseConfig.

	* app/config/gimpconfig-types.h: added missing GIMP_VALUE_HOLDS_FOO()
	macros.

	* app/config/gimpconfig-deserialize.c: UTF8-validate all strings.

	* app/config/gimpconfig-serialize.c: some code reorganisation.