* cygpath.cc (do_sysfolders): Use cygwin_conv_path.

	* cygpath.cc (do_sysfolders): Use cygwin_conv_path.
	(do_pathconv): Use cygwin_conv_path and cygwin_conv_path_list.
	* dumper.cc (main): Use cygwin_conv_path.  Allocate target path
	dynamically.
	* mkpasswd.c (current_user): Use cygwin_conv_path.
	(enum_users): Ditto.
	* ps.cc (NT_MAX_PATH): Define.
	(main): Use cygwin_conv_path.
	* regtool.cc (find_key): Ditto. Allocate target path dynamically.
	(cmd_save): Ditto.