* autoload.cc (SHFileOperationA): Drop definition.

	* autoload.cc (SHFileOperationA): Drop definition.
	* ntdll.h (struct _FILE_RENAME_INFORMATION): Define.
	* path.cc (fs_info::update): Note length of rootdir prefix in
	root_len.
	(get_nt_native_path): New function, taking over functionality of
	path_conv::get_nt_native_path.
	(path_conv::get_nt_native_path): Just call get_nt_native_path.
	* path.h (get_nt_native_path): Declare.
	(struct fs_info): New member root_len.
	(fs_info::length): New inline method returning root_len.
	(path_conv::rootdir): New inline method returning rootdir prefix.
	* syscalls.cc (try_to_bin): Rewrite using only system calls.
	(unlink_nt): Call try_to_bin with additional handle to open file
	parameter.
	(statvfs): Use path_conv::rootdir method.
	* wincap.h: Define has_recycle_dot_bin throughout.
	* wincap.cc: Ditto.