K 10
svn:author
V 3
pfg
K 8
svn:date
V 27
2013-06-20T00:00:33.446695Z
K 7
svn:log
V 201
Rename some prefixes in the Block Group Descriptor fields to ext4bgd_

Change prefix to avoid confusion and denote that these fields
are generally only available starting with ext4.

MFC after:	3 days

END