load_inst(): Implement the security hook that cPickle already had.
When unpickling callables which are not classes, we look to see if the
object has an attribute __safe_for_unpickling__.  If this exists and
has a true value, then we can call it to create the unpickled object.
Otherwise we raise an UnpicklingError.

find_class(): We no longer mask ImportError, KeyError, and
AttributeError by transforming them into SystemError.  The latter is
definitely not the right thing to do, so we let the former three
exceptions simply propagate up if they occur, i.e. we remove the
try/except!

documentation.  This addresses previously undocumented parts of the
public interfaces, the differences between pickle and cPickle,
security concerns, and on and on.

Fred please proofread!

clarify some of the interface.

thing in the index.

dictionary().

special-cases classic classes, it doesn't do anything about other
cases where different metaclasses are involved (except for the trivial
case where one metaclass is a subclass of the others).  Also note that
it's metaclass, not metatype.

Life Preserver" by Matt Conway.

of multiple inheritance from a mix of new- and classic-style classes.
This is his patch, plus a start at some test cases from me.  Will check
in more, plus a NEWS blurb, later tonight.

for a month or more.

by Thomas Heller (patch 459442).

used the default Darwin/* for the old code. Reversed those tests so
that compatibility code is in a switch leg with a specific version and
newer systems take the default leg.

This should allow Python to build on OSX 10.1.1 (which jumps from Darwin/1.4
to Darwin/5.1 due to a new numbering scheme).

to have single "expected output" file.

This gives mmap() on Windows the ability to create read-only, write-
through and copy-on-write mmaps.  A new keyword argument is introduced
because the mmap() signatures diverged between Windows and Unix, so
while they (now) both support this functionality, there wasn't a way to
spell it in a common way without introducing a new spelling gimmick.
The old spellings are still accepted, so there isn't a backward-
compatibility issue here.

uninitialized memory reads reported in bug #478001.

Note that this doesn't address the following larger issues:

- Error conditions are not documented for PyOS_*sig() in the C API.

- Nothing that actually calls PyOS_*sig() in the core interpreter and
  extension modules actually /checks/ the return value of the call.

Fixing those is left as an exercise for a later day.

addresses.  Commented out because it still takes too long to run.

for dumbdbm.py, by Skip Montanaro.  The first half of Skip's patch has
been postponed until Py2.3 since it adds new features.

deleted its declaration.

field exists with an empty value.

IndexError when a Date: field exists with an empty value.

clearly (but incorrectly) assuming it.

- Added a note about the limit stack command
- Revoved the note about largefile
- Added a note about /usr/local not existing by default.

remove DL_IMPORT.

linked against. Most, but not all, of it is included in
PythonCore, but extensions may want to use some of
the routines not included. Fixes a bug reported by
Tom Loredo.

Tom Loredo.