weren't constructed properly.

- The cache used an excessive amount of memory, causing applications
  with large caches to exhaust available memory.

- Fixed a number of bugs in the handling of persistent ZEO caches:

- Cache records are written in several steps.  If a process exits
    after writing begins and before it is finishes, the cache will be
    corrupt on restart.  The way records are writted was changed to
    make cache record updates atomic.

- There was no lock file to prevent opening a cache multiple times
    at once, which would lead to corruption.  Persistent caches now
    use lock files, in the same way that file storages do.

- A bug in the cache-opening logic led to cache failure in the
    unlikely event that a cache has no free blocks.

there are no tests for BTrees.Length; add tests that show that the Length
object will properly switch to longs when over/underflowing 32-bit values

instead of a POSKeyError.

Complete authentication configuration through XML on the client side. Server part was implemented way back in 2003.

mode.

two calls where actually necessary to guaranteed get an unused revid between
two used ones.

Removed pointlss module doc string.

fact that it was out of date.

  cache size.

Also updated the format to allow cache files larger than 4G in size.

ZEO, still needs to be removed.