Log Message:
Update to 2.9.1.  Changes:

Some Install script fixes.
Fixed a problem in blockrequest() where a buffer
  could have been used after it was free()'d which
  resulted in segfaults.
Check that feedback buffer is not null before
  operating on it in chain_select().
  Closes #631353, thanks Sami Farin.
Make sure DH/DSA param file is actually opened
  before writing to it. Fixes a segfault in
  case it is not.
Handle a pool we cannot read correctly: don't close
  the NULL dir handle (segfaults on *BSD). We also
  print a warning in that case now.
Minor stats fix (gmtime vs localtime).
Fix pool stats bug.