o Minor bugfixes (logging):
    - Stop closing stderr and stdout during shutdown. Closing these file
      descriptors can hide sanitiser logs.
      Fixes bug 33087; bugfix on 0.4.1.6.
    - Flush stderr, stdout, and file logs during shutdown, if supported by the
      OS. This change helps make sure that any final logs are recorded.
      Fixes bug 33087; bugfix on 0.4.1.6.