For those people who insist on ignoring the obvious.

Missed this in 7ce29b9e

Hallvard Furuseth authored 9 years ago and Howard Chu committed 9 years ago

Except we don't catch the user passing F_SUBDATA to
mdb_cursor_<put/del>, like an internal LMDB call.

Don't change mc_dbx because we would need to undo the change if
the txn aborts. Make the fix (for get) match existing code for put.

This reverts commit 47c4e747.

Revert "ITS#8117 fix INTEGERDUP compare"

This reverts commit ba45e0c0.

Fix mdb_txn_begin(&read-only txn) calls. Test mdb_env_set_maxreaders().
Rename DBI open/close functions. Move mdb_dbi_close() out of txn.

(Probably fixes the ITS, definitely fixes a bug) when collapsing
the root page, fixups of other cursors was incomplete.