The workaround was removed from the logging module by creating python
properties for verbosity related settings in the terminalreporter.

Closes: pytest-dev#4733

pytest.main: collect: factor out _visit_filter

Fix "ValueError: Plugin already registered" exceptions when running in build directories that symlink to actual source.

…etadata

Ignore pip-generated 'pip-wheel-metadata' folder [skip ci]

Remove terminal_reporter workaround from logging.py

Document junit_family option in the reference docs

tox-dev/tox#706 has been fixed.

For tox-dev/tox@c611a16

Clarify pytest_assertrepr_compare docs per pytest-dev#4759

tox: use deps for pluggymaster testenvs

This can spam a lot of warnings (per invocation), e.g.:

> lsof: WARNING: can't stat() nsfs file system /run/docker/netns/default
        Output information may be incomplete.

Or from Travis/MacOS:

> lsof: WARNING: can't stat() vmhgfs file system /Volumes/VMware Shared Folders
>       Output information may be incomplete.
>       assuming "dev=31000003" from mount table

While I think that pdb++ should be fixed in this regard (by using
`pdb.Pdb`, and not `self.__class__` maybe), this ensures that custom
debuggers like this are working.

Ref: pytest-dev#4344 (comment)

…_and_file_in_args

Fix handling of pkg init and test file via args

--lsof: suppress stderr

Fixes pytest-dev#4772, pytest-dev#4770.

flatten is an alias in more-itertools anyway

Constrain more_itertools for Python 2.7 compatibility

pdbpp: fix capturing with recursive debugging

Just a few environments for now to see how it will behave for a few days

Does not work on Azure Pipelines at all unfortunately

Replace flatten() with chain.from_iterable

Preparing release version 4.2.1

Set up CI with Azure Pipelines [skip travis] [skip appveyor]

Conflicts:
	tox.ini