iam:

iam:

  - separate code better,

  - finish iam_lfix format,

  - add format guessing: self-contained iam file that keeps (in the o-th page)
    its own meta-information: key and record size, etc.

  - user level tool ./lustre/utils/iam_create.c to create lfix iam files.

osd:

  - interface to iam isolating upper layers from knowledge of iam details.

fld:

  - adjust to changed indexing interface.