importance of cache size and the need to recompile extensions for
PER_GHOSTIFY().

Add entries for the Connection change made today and a very generic
entry to describe all the BTrees bugs that Tim has fixed.

encoding with cache servers.

reported errors about this; hopefully it will now work again (if they
use setup.py for their build).

with an alternative that works under command.com too.  Building the
splitters still fails on command.com systems because the synthesized
command lines are very long (command.com appears to truncate them,
leaving gibberish commands).

Reimplemented Index.length to use a BTree.Length. Previous dynamic computation was way too slow for big indexes.
Updated tests to include length value checks

so makes the full suite brittle.  Cleaned out all the places where unit
tests change sys.path.  (Use the PYTHONPATH environment variable instead.)

Also brought SearchIndex tests up to date, which I didn't really need to do
since SearchIndex is deprecated, but I did it as part of figuring out the
failed Interface tests, so I might as well check in my work. ;-)  One of the
test modules in SearchIndex forgets to define a global named "Dummy",
actually, so all the tests were failing before this checkin anyway.

the _p_jar attributes set.

attribute.  The ownership code must take this into account.

A moment of silence, please.

in order to comply with nested scopes rules.

All Zope process will respond to signals in the specified manner:

  SIGHUP -  close open database connections and sockets, then restart the
            process

  SIGTERM - close open database connections and sockets, then shut down.

  SIGINT  - same as SIGTERM

  SIGUSR2 - rotate all Zope log files (z2.log, event log, detailed log)

The common idiom for doing automated logfile rotation will become:

kill -USR2 `cat /path/to/var/z2.pid`

The common idiom for doing "prophylactic" restarts will become:

kill -HUP `cat /path/to/var/z2.pid`

When a process is interrupted via ctrl-C or via a TERM signal (INT, TERM),
all open database connections and sockets will be closed before
the process dies.  This will speed up restart time for sites that
use a FileStorage as its index will be written to the filesystem before
shutdown.

Unspecified signals kill the process without doing cleanup.

- minor source code cleanup

The only API change was the removal of the getVocabulary method from ZCatalog.
Old-style TextIndexes can now acquire a Vocabulary from anywhere.
No Indexes, metadata or vocabulary objects are created automatically by ZCatalog.

Collector #376.

As a result of this checkin:

 - a new permission 'Copy or Move' will be registered for all classes
   that inherit from OFS.CopySupport.CopySource.  This includes
   almost all Zope objects, as SimpleItem inherits from CopySource.

 - the new permission will be granted to the Anonymous and Manager
   roles by default.

 - Site managers may choose to disallow copying of objects by
   revoking the Copy or Move permission respective to a role in
   a place or globally.

Notes:

The methods cb_isCopyable and cb_isMoveable are coopted for this
duty, although access control was never in their job description
prior to this patch.

Moved _Attribute.py module back to Attribute.py at Jim's behest in the name of maintaining similarity with the Zope 3 Interface package.

Removing mysterious setup of new objects' _p_jar in __setitem__.  I'm really not sure why it was there.  Hopefully I won't find out in production. ;-)