Virtualenv

~~~~~~~~~~~~~~~~~~
- Fix discovery of interpreter by name from ``PATH`` that does not match a spec format - by :user:`gaborbernat`. (`1746 <https://github.com/pypa/virtualenv/issues/1746>`_)

~~~~~~~~~~~~~~~~~~
- Do not fail when the pyc files is missing for the host Python 2 - by :user:`gaborbernat`. (`1738 <https://github.com/pypa/virtualenv/issues/1738>`_)
- Support broken Packaging pythons that put the include headers under distutils pattern rather than sysconfig one
- by :user:`gaborbernat`. (`1739 <https://github.com/pypa/virtualenv/issues/1739>`_)

~~~~~~~~~~~~~~~~~~
- Fix relative path discovery of interpreters - by :user:`gaborbernat`. (`1734 <https://github.com/pypa/virtualenv/issues/1734>`_)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- :ref:`supports <compatibility-requirements>` details now explicitly what Python installations we support
- by :user:`gaborbernat`. (`1714 <https://github.com/pypa/virtualenv/issues/1714>`_)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Document requirements (pip + index server) when installing via pip under the installation section - by
:user:`gaborbernat`. (`1618 <https://github.com/pypa/virtualenv/issues/1618>`_)
- Document installing from non PEP-518 systems - :user:`gaborbernat`. (`1619 <https://github.com/pypa/virtualenv/issues/1619>`_)
- Document installing latest unreleased version from Github - :user:`gaborbernat`. (`1620 <https://github.com/pypa/virtualenv/issues/1620>`_)

~~~~~~~~~~~~~~~~~
- ``pythonw.exe`` works as ``python.exe`` on Windows - by :user:`gaborbernat`. (`1686 <https://github.com/pypa/virtualenv/issues/1686>`_)
- Handle legacy loaders for virtualenv import hooks used to patch distutils configuration load - by :user:`gaborbernat`. (`1690 <https://github.com/pypa/virtualenv/issues/1690>`_)
- Support for python 2 platforms that store landmark files in ``platstdlib`` over ``stdlib`` (e.g. RHEL) - by
:user:`gaborbernat`. (`1694 <https://github.com/pypa/virtualenv/issues/1694>`_)
- Upgrade embedded setuptools to ``45.3.0`` from ``45.2.0`` for Python ``3.5+`` - by :user:`gaborbernat`. (`1699 <https://github.com/pypa/virtualenv/issues/1699>`_)