Log Message:
Updated to version 1.33

Interesting changes since 1.21
==============================
      * memGunzip has very slow on FreeBSD. Turns out to be down to
        the way realloc works on FreeBSD. Changed both inflate & deflate
        to use exponentially increasing buffer sizes when they need to
        realloc. Thanks to Peter Jeremy for the lowdown on FreeBSD
        memory allocation.
      * Fixed a bug in the inflate method where the input buffer is an
        lvalue (via substr). Problem & solution reported by Salvador Fandiqo.
      * Tightened up the logic in Makefile.PL when BUILD_ZLIB is
        True. Issue spotted by Ralf S. Engelschall.
      * Added prototypes to the subs in Zlib.pm that didn't already have
        them. Patch from Ed Avis.
      * Documentation for some of the gz functions updated.
      * Fix to allow intermingling of gzread & gzreadline - patch
        supplied by Doug Perham.
      * memGunzip will silently now work if the gzip trailer is
        missing. Some HTTP Origin Servers seem to leave it out.