* Rename setup_python() to setup_tests()
* Remove use_resources parameter of runtest()

Slaves (child processes running tests for regrtest -jN) now inherit
--memlimit/-M, --threshold/-t and --nowindows/-n options.

* -M, -t and -n are now supported with -jN
* Factorize code to run tests.
* run_test_in_subprocess() now pass the whole "ns" namespace to the child
  process.

* Factorize code to run tests.
* run_test_in_subprocess() now pass the whole "ns" namespace to the child
  process.

Running the Python test suite with -jN now:

- Display the duration of tests which took longer than 30 seconds
- Display the tests currently running since at least 30 seconds
- Display the tests we are waiting for when the test suite is interrupted

Clenaup also run_test_in_subprocess() code.

Python doesn't display the refcount anymore by default. It only displays it
when -X showrefcount command line option is used, which is not the case here.
regrtest can be run with -X showrefcount, the option is not inherited by child
processes.

Add a new Regrtest.run_test() method to ensure that --coverage pass the same
options to the runtest() function.

Move the code to run tests in multiple processes using threading and subprocess
to a new submodule.

Move also slave_runner() (renamed to run_tests_slave()) and
run_test_in_subprocess() (renamed to run_tests_in_subprocess()) there.

with attributes and methods.

The --threshold command line option is now ignored if the gc module is missing.

* Convert main() variables to Regrtest attributes, document some attributes
* Convert accumulate_result() function to a method
* Create setup_python() function and setup_regrtest() method.
* Import gc at top level
* Move resource.setrlimit() and the code to make the module paths absolute into
  the new setup_python() function. So this code is no more executed when the
  module is imported, only when main() is executed. We have a better control on
  when the setup is done.
* Move textwrap import from printlist() to the top level.
* Some other minor cleanup.

now accept the self and the dict keyword arguments.

now accept the self and the dict keyword arguments.

now accept the self and the dict keyword arguments.

argument.

argument.

argument.

unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
opcodes no longer silently ignored on 32-bit platforms in C implementation.

unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
opcodes no longer silently ignored on 32-bit platforms in C implementation.

unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
opcodes no longer silently ignored on 32-bit platforms in C implementation.

and nested format_specs. Patch by Anthon van der Neut.