PERFORCE change 216629 for review

[Zheng Liu]

http://p4web.freebsd.org/@@216629?ac=10

Change 216629 by lz at gnehzuil-desktop on 2012/08/28 16:23:39

	Obsolete htree code should be removed because we will re-implement it
	accroding to NetBSD's implementation.  It brings some bennifits for us.
	First, the code almost the same between these two OSs.  Second, the
	hash function are in BSD-license, and they are consistent with our other
	files.

Affected files ...

.. //depot/projects/soc2010/extfs/src/sys/fs/ext2fs/ext2_hash.c#4 delete
.. //depot/projects/soc2010/extfs/src/sys/fs/ext2fs/ext2_htree.c#3 delete
.. //depot/projects/soc2010/extfs/src/sys/fs/ext2fs/hash.h#2 delete
.. //depot/projects/soc2010/extfs/src/sys/fs/ext2fs/htree.h#4 delete

Differences ...