Log Message:
p5-IO-AIO: update to 4.4.

4.4   Tue Feb 20 07:54:12 CET 2018
	- new aio_slurp request.
        - add (experimental) IO::AIO::eventfd and timerfd* function.
	- add (experimental) IO::AIO::get_fdlimit and IO::AIO::min_fdlimit.
        - point out that aio_copy overwrites existing files.
        - removed filesystem magic number table from aio_statvfs docs as
          statvfs doesn't actually return this info at all (statfs does).
        - add a bunch of (mostly linux-specific) constants for use in ioctls
          (see aio_ioctl docs).
        - treescan now has a proper manpage and useful --help output.
        - new option --sync in treescan, to sync everything in a subtree.
        - changed default for aio_msync flags to MSYNC_SYNC.
        - document offset/length behaviour of mprotect/madvise.
        - support linux's renameat2 (via aio_rename2).
        - add aio_rename2, an aio_rename with flags.
        - add F_DUPPFD_CLOEXEC, F_OFD_[SG]ETLKW? constants.
        - add FALLOC_FL_INSERT_RANGE, FALLOC_FL_UNSHARE_RANGE.
        - (libeio) use posix_close if available.
        - (libeio) internal close() calls no longer disturb errno.
        - add IO:AIO::FALLOC_FL_UNSHARE.
        - update schmorp.h for removal of USE_SOCKETS_AS_HANDLES
          and better eventfd detection.