Replace METH_VARARGS with METH_NOARGS, discard win32 ifdefs (it's no more compiled on win32 anyway).

prevent traceback when connection is lost while waiting for user to accept plain connection or ssl certificate. Fixes #4285

verified and NOT verified is _NOT_ both "Verwende Authentifizierung".
That's just super wrong and leads the user to the false impression of
security.

Do not always force backend removal when performing a delayed remove operation. Some coding standards.