It is possible to do a cursor delete and then a DB_NEXT_DUP.[[BR]]
BDB handles this properly.
Addresses #121

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Remove some leading __ (double underbars) from some symbols.  (Addresses #8.)
Improve the verification of node sizes (because recovery is having trouble with this.  Addresses #27.)


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closes #107

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Addresses #112
Needs #121 to be finished before we can close it.

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Finished splitting functions into regular/noassociate versions.
Fixed bug where DB->del tried to delete the primary key (instead of secondary key) from
secondary indexes

Closes #117
Closes #120

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addresses #116

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returned SECONDARY_BAD for c_pget,
addresses #116

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DB_NOASSOCIATE
addresses #116

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fix the ncursors > 0 assert in the nonleaf expand code caused when the cursor path traverses the child at the split point.  addresses #119

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Add some information needed for recovery.  Changed the size of the serialization, and caused a new cursor bug to show up.  Addresses #27.


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deleting from dbs with duplicates.
addresses #112

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We want to be able to do 
 make VGRIND=
and not end up having the extra valgrind parameters passed around.
Addresses #105.


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DB->get (on secondary indexes) now call DB->pget instead of having almost identical code.

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Closes #111

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so newbrt/log_header.h and newbrt/log_code.c are generated even if missing.
Closes #60.

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{{{
Added DB_SECONDARY_BAD to db.h
Added DB_CURRENT to db.h

    DB->get         (now returns DB_SECONDARY_BAD when appropriate)
    DB->pget        (now returns DB_SECONDARY_BAD when appropriate)
    ** DBC->c_get   (works with associate)
    ** DBC->c_pget  (added function, works with associate, but not in header yet)
    ** *DBC->c_del  (works with associate)
    *DB->del        (works with associate)

*   May not work properly with duplicates.
*   Question: Do I have to use
        search_val.flags = DB_DBT_MALLOC;
            and
        free(search_val.data);
**  Requires DB_CURRENT to be supported in toku_brt_cursor_get
}}}
addresses #48


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(unless called internally with DB_NO_ASSOCIATE flag set)

Modified test_db_secondary to verify this behavior.
Closes #106

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