Log Message:
Changes 1.312:
* Apply Stephen Oberholtzer's patch to fix a test freeze.
* IO::Handle->blocking() is broken on MSWin32, locking up
  t/10_units/04_drivers/01_sysrw.t in some cases. Stephen provided a
  patch to Perl and to POE to work around the issue. It's portable
  enough that things shouldn't immediately break after Perl is fixed.
* Resolves rt.cpan.org ticket 69769.
* getnameinfo() returns host and port in the opposite order of
  unpack_sockaddr_in(). Swap the return values so the right ones appear
  in ARG1 and ARG2. Thanks to Luiz Eduardo Roncato Cordeiro at CERT
  Brazil for spotting the problem and suggesting the fix. This should
  resolve his rt.cpan.org ticket, #68959.
* Add stack traces to _data_handle_remove() failures.
* Add note about Perl 5.6 issues with '>&' open mode
* Document using getsockname to verify a listening socket
* Localize $SIG{__DIE__} when rethrowing userspace exceptions from a
  safe point. Avoids shenanigans at a distance when reporting on
  userspace errors. May thwart someone's exception handling, but I
  don't know a good way to satisfy everyone here. Suggestions?
* Don't fail t/00_info.t if POE::Test::Loops is unavailable.
* This test dependency is intended to be optional, and the loop tests
  should be skipped if the user doesn't want them. Problem reported by
  skbz in irc.perl.org #poe, related to cpanm installing
  POE::Test:Loops in a user-local directory but not looking there when
  installing POE.
* Fix mangled stdio checks. This one passes all tests.