epylint not able to parse a .pylintrc file in a subdirectory on Windows

[thernstig]

Steps to reproduce

1. Add this to a file called test.py

''' Script to lint all code e.g. python '''
import os
from pylint import epylint

def lint_pylint():
    ''' Lint all python code with pylint '''
    pylintrc = os.path.join("afolder", ".pylintrc")
    epylint.py_run(f'afolder -j 0 --rcfile={pylintrc}')

if __name__ == "__main__":
    lint_pylint()

2. Add a .pylintrc in a directory like: afolder/.pylintrc
3. Run test.py

Current behavior

It cannot handle .pylintrc files on Windows not in the same folder as the command being run. You thus get an error like:

(venv) ~\Desktop\projects\test [master]> python .\test.py
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Moo\Desktop\projects\test\venv\lib\site-packages\pylint\lint.py", line 1301, in __init__
    linter.read_config_file()
  File "C:\Users\Moo\Desktop\projects\test\venv\lib\site-packages\pylint\config.py", line 646, in read_config_file
    raise IOError("The config file {:s} doesn't exist!".format(config_file))
OSError: The config file afolder.pylintrc doesn't exist!

Expected behavior

For it to work. The problem can be found in how shlex.split is invoked on Windows. The line here https://github.com/PyCQA/pylint/blob/9dd978aaed0daf852d8caed515b9e4e13f2dfcc7/pylint/epylint.py#L142 could be changed to:

options = shlex.split(command_options, posix='win' not in sys.platform)

pylint --version output

(venv) ~\Desktop\projects\test [master]> pylint --version
No config file found, using default configuration
pylint 1.8.2,
astroid 1.6.1
Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)

[thernstig]

I will have a merge request incoming any second.