Comment # 46 on bug 1087891 from Thorsten Kukuk

Thanks to the fix from Kiall I get now the correct error messages:

pymysql.connect: localhost:3306/salt
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 921, in
connect
    **kwargs)
  File "/usr/lib64/python3.6/socket.py", line 724, in create_connection
    raise err
  File "/usr/lib64/python3.6/socket.py", line 713, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused


So the situation is:
salt/PyMySQL tries to connect to the mysql database via localhost:3306, but
this does not work (permission denied). It's not using /run/mysql/mysql.sock

How should this work?
Did we configure salt to use the unix socket, and this information goes somehow
lost in salt/PyMySQL (pymysql.connect is called without unix socket name, else
it would not end in this branch), or should mysql listen on localhost:3306?