* IO::Uncompress::Gzip
        Documentation of ExtraFlags stated the XFL values for BEST_COMPRESSION
        and BEST_SPEED use the values 2 & 4 respectively. They should
        be 4 & 2. Code for setting XFL was correct.

      * RT #95494: IO::Uncompress::Gunzip: Can no longer gunzip to in-memory
        file handle