user defined help items

in PyShell.py that was causing extreme headaches in
working on EditorWindow.py

better local_hostname default.  According to RFC 2821, it is
recommended that the fqdn hostname be provided in the EHLO/HELO verb
and if that can't be calculated, to use a domain literal.

The rationale for this change is documented in SF patch #497736 which
also had privacy concerns about leaking the fqdn in the EHLO/HELO.  We
decided this wasn't a big concern because no user data is leaked, and
the IP will always be leaked.  The local_hostname argument is provided
for those clients that are super paranoid.

Using localhost.localdomain may break some strict smtp servers so we
decided against using it as the default.

LDEF in Python). If at all possible, this should go into 2.2.1.

Don't die when issubclass(t, TypeType) fails.

Bugfix candidate (but I think it's too late for 2.2.1).

readline and get rid of string exception fallback when showing syntax
errors.
see bug 411881

see bug 411881

see bug 411881

This closes SF bug #520904.

Explain that many of the escapes supported by string literals are also
supported by the RE compiler, and list which ones.
This closes SF bug #529923.

methods in dict-proxy objects.

dict-proxy objects.

Add real docstrings to all methods.

Due to interaction between the MSL C library and the GUSI I/O library I can get reads from sockets to work consistently either for unbuffered binary files or for buffered binary files, but not for both:-(

The workaround is to force socket.makefile() to disable buffering for binary files.

Fixes bug 534625. 2.2.1 candidate.

Fix whitespace on a line also.

'94, demonstrating a thread bug that was later repaired via Python growing
an internal import lock.  It's of no current interest, and the now-std
test_threaded_import.py is pretty much the same test.

ever do, they can damn well #define _POSIX_THREADS their own damn selves.

Weaklink most toolbox modules, improving backward compatibility. Modules will no longer fail to load if a single routine is missing on the curent OS version, in stead calling the missing routine will raise an exception.

Should finally fix 531398. 2.2.1 candidate.