39d99c1186
check-hash after making changes to the cylinder group. The problem was that the journal-recovery code was calling the libufs bwrite() function instead of the cgput() function. The cgput() function updates the cylinder-group check-hash before writing the cylinder group. This change required the additions of the cgget() and cgput() functions to the libufs API to avoid a gratuitous bcopy of every cylinder group to be read or written. These new functions have been added to the libufs manual pages. This was the first opportunity that I have had to use and document the use of the EDOOFUS error code. Reviewed by: kib Reported by: emaste and others
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