* flock.cc (LOCK_DIR_NAME_FMT): Define.

	(LOCK_DIR_NAME_LEN): Define.
	(LOCK_DIR_NAME_DEV_OFF): Define.
	(LOCK_DIR_NAME_INO_OFF): Define.
	(LOCK_OBJ_NAME_FMT): Define.  Add comment.
	(class lockf_t): Use bitsize-explicit types.  Declare from_obj_name,
	(class inode_t): Make use, unuse and inuse methods public.  Add a
	lock argument to get method declaration.
	(inode_t::get): Add lock argument.  Only lock node if lock arg is true.
	(inode_t::inode_t): Use LOCK_DIR_NAME_FMT as format string.
	(lockf_t::from_obj_name): New method to generate lockf_t content from
	lock event object basename.
	(inode_t::get_all_locks_list): Just call from_obj_name here and copy
	result into final lockf_t.
	(create_lock_obj_attr): Use LOCK_OBJ_NAME_FMT as format string.
	(create_lock_in_parent): New thread function to create lockf_t
	structure in parent process.
	(delete_lock_in_parent): New thread function to reap stale BSD locks in
	parent process.
	(lockf_t::create_lock_obj): Try to duplicate lock object handle into
	parent process and call create_lock_in_parent as parent remote thread.
	(lockf_t::del_lock_obj): Call delete_lock_in_parent as parent remote
	thread.
	(fhandler_disk_file::lock): Add lock arg to inode_t::get call.

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