Will backport to 2.3.1

Noted that the SHA algorithm is really SHA-1.
(Contributed by Ronald Rivest.)

Hettinger in comments for issue 804115
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=804115&group_id=5470

* Expanded coverage.

iteritems() is defined.

Backported to 2.3.

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.

- removed use of the string module
- fixed some broken markup

- update a couple of URLs to point to more recent portions of
  python.org

little better, with similar spacing characteristics with the seealso
environment

(Contributed by George Yoshida.)

- cleaned up some markup

its first three arguments.

Closes RFE #798046 .

module

The documentation severely departed for the actual implementation.

1. Remove "idle" script, it lives in Tools/scripts/ now.
2. Remove shebang from idle.py, should be called explicitly.
3. Remove obsolete test code from rpc.py; needs unit test.

Will backport to 2.2.