Fix Known Bugs

1. Reference counting (counts of instances of SDL types) does not work properly. It is controlled by an object-cache option and that is turned off at all times.

2. The du command is disabled. The df command works only on / or the entire volume.

3. Index updates cause an exclusive lock to be obtained on the index object (thereby locking the entire index).

4. Application executables are too large. We should be able to re-structure the libraries to cut down the sizes. Some of the reasons might have to do with templates.

5. The server's log cannot be a raw device.

6. The legitimacy of logical OIDs pre-allocated by the object cache is not checked.

7. Bulkloading an empty index (using sorted streams) causes an assert failure

8. The caclulation for reserving log space to abort a transaction is incorrect. Therefore, if a long running transaction runs out of log space, its automatic rollback may fail with an internal error. Restart recovery will complete the rollback.

9. There are several recovery bugs that we haven't been able to reproduce.