(Contributed by George Yoshida.)

Add support for the iterator and mapping protocols.
For Py2.3, this was done for shelve, dumbdbm and other mapping objects, but
not for bsddb and dbhash which were inadvertently missed.

sleepycat has told him that since python is OSS and berkeleydb is
being distributed with python for the bsddb library all is fine.

oriented DbEnv & Db object BerkeleyDB interface.

Include a note about Sleepycat's BerkeleyDB license with regards to
distributing it within non-opensource applications and include a link
to their website for license details.

Document that 'r' is the default flag for the legacy bsddb btopen(),
hashopen(), and rnopen() functions.  This is apparently different than the
dbm libraries in other languages according to Bug #732951.  Changing
the default from 'r' to 'c' would break backwards compatibility with
legacy bsddb applications; documenting the default should suffice.

closes SF #514433

can now pass 'None' as the filename for the bsddb.*open functions,
and you'll get an in-memory temporary store.

docs are ripped out of the bsddb dbopen man page. Fred may want to
clean them up.

Considering this for 2.2, but not 2.1.

BTree databases, the key need not be in the database.  Also, tell about
the exception if the key is not in the DB for other DB types.

This closes SF bug #127377.

related to the BSD DB library.  Based on comments from Mark Summerfield
<summer@netcraft.com>.

(Very rough.)

on comments from Detlef Lannert <lannert@lannert.rz.uni-duesseldorf.de>.

databases (opened using hashopen()), as noted by Skip Montanaro on
comp.lang.python.