Remove code for old-style classes:
better_exchook2.py:238:62: E1101: Module 'types' has no 'InstanceType' member (no-member)
Command-line equivalent of 9a33c2a65 ("Make requesting login form password work on Python 3", 2020-04-14):
command/setup_config.py:167:36: E1101: Module 'linkcheck.director.console' has no 'encode' member (no-member)
Add missing argument:
plugins/parseword.py:141:31: E1120: No value for argument 'wrange' in function call (no-value-for-parameter)
With PyOxidizer 0.18.0 AppName in setup.py has to be changed to the
all lower case "linkchecker".
Application translations do not work.
better_exchook2.fallback_findfile() may still need converting, first
needs a test.
drop_privileges() is only used by the linkchecker command.
Move installing SIGUSR1 handler to the linkchecker command only - fixes
intermittent test failures.
