* fhandler.h (enum dirent_states): Remove dirent_saw_cygdrive,

	* fhandler.h (enum dirent_states): Remove dirent_saw_cygdrive,
	dirent_saw_dev and dirent_saw_proc.
	(fhandler_cygdrive::open): Declare.
	(fhandler_cygdrive::close): Declare.
	* fhandler_disk_file.cc (class __DIR_mounts): Move to beginning of file.
	(__DIR_mounts::check_mount): New parameter to indicate if inode number
	is needed in calling function or not. Add /proc and /cygdrive handling.
	(__DIR_mounts::check_missing_mount): Ditto.
	(path_conv::ndisk_links): Use __DIR_mounts class to create correct
	hardlink count for directories with mount points in them.
	(fhandler_disk_file::readdir_helper): Remove /dev, /proc and /cygdrive
	handling.
	(fhandler_cygdrive::open): New method.
	(fhandler_cygdrive::close): New method.
	(fhandler_cygdrive::fstat): Always return fixed inode number 2 and
	fixed link count of 1. Drop call to set_drives.
	(fhandler_cygdrive::opendir): Drop call to get_namehash.
	(fhandler_cygdrive::readdir): Handle "." entry to return fixed inode
	number 2.