importation, then respect that injection.

Discovered thanks to Lib/xml/parsers/expat.py injecting
xml.parsers.expat.errors and etree now importing that directly as a
module.

access fails (expectedly) if other modules have already used decimal. The
only option is to remove the test.

the recent change of the default value for context.Emax.

a multiprocessing Client or Listener with an AF_PIPE type address under
non-Windows platforms.  Patch by Popa Claudiu.

a multiprocessing Client or Listener with an AF_PIPE type address under
non-Windows platforms.  Patch by Popa Claudiu.

I will now continue investigating the cause of the ref-leak, but I wanted
to remove the test so that the refcount test in the buildbots could be clean.
The whole change (adding GC to Element) is not reverted because it improved
the situation (GC works for immediate cycles) and didn't cause regressions
(the test is new and was added together with the fix).

Patch by Suman Saha.

Patch by Suman Saha.