Log Message:
Update to 4.33.0. From the changelog:

- allow normal exit on interrupt (ctrl-c) to allow the uesr to abort
  message retrieval while still remembering already-retrieved
  messages as successfully delivered. You may get a weird error
  message after you abort, since the server may be in the middle
  of delivering another message to getmail at the time. Thanks:
  Krzysztof Warzecha.