Log Message:
Update to 1.22:

v1.22 2009.01.24
- Net::SSLeay stores verify callbacks inside hash and never clears them, so
  set verify callback to NULL in destroy of context

v1.21 2009.01.22
- auto verification of name in certificate created circular reference between
  SSL and CTX object with the verify_callback, which caused the objects to be
  destroyed only at program end. Fix it be no longer access $self from inside
  the callback.
  Thanks to odenbach[AT]uni-paderborn[DOT]de for reporting

v1.20 2009.01.15
- only changes on test suite to make it ready for win32
  (tested with strawberry perl 5.8.8)