Changes for version 1.91
- perl5porters broke Async::Interrupt, BDB, EV, IO::AIO, OpenCL without warning by switching the meaning of USE_SOCKETS_AS_HANDLES in 5.18. What's so attractive about giving a shit about backwards compatibility - I will never understand.
- make sure DBD.pm is installed to the correct directory.
- support up to bdb 6.0.
- (xthread) work around compile time bugs in ptw32.
- BDB - Asynchronous Berkeley DB access