PATCH: setup.exe - local download directory selection dialog

[DJ Delorie]

Applied, with a few minor changes.  Thanks!

> 2000-08-31  Andrej Borsenkow  <Andrej.Borsenkow@mow.siemens.ru>
>
> 	* localdir.cc: new, local package directory selection dialog;
> 	cd into selected directory
>
> 	* Makefile.in (OBJS): add localdir.o
> 	* dialog.h: add prototype for do_local_dir
> 	* main.cc. (WinMain): initialize local_dir to cwd;
> 	add call to do_local_dir
> 	* net.cc (dialog_cmd): make DO_LOCAL_DIR next dialog
> 	* source.cc (dialog_cmd): ditto
> 	* res.rc: add DO_LOCAL_DIR dialog;
> 	remove "current directory" from presented choices in IDD_SOURCE;
> 	add IDS_ERR_CHDIR error string
> 	* resource.h: defines for DO_LOCAL_DIR dialog; define IDS_ERR_CHDIR
> 	* root.cc (dialog_cmd): make DO_LOCAL_DIR previous dialog
> 	* state.h: add local_dir variable