s3: Restore async i/o with the "native" AIO interface
eff3609 moved the async signal handler initialization to later in the process
to enable aio_fork and aio_pthread on platforms without realtime signals. This
commit broke the use of the native aio interface. aio_pending_size is
initialized to 0, so aio.c will not allow async i/0 at all if modules do not
set that variable correctly. Initialize to 100 right from the start.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Jun 26 14:08:22 CEST 2012 on sn-devel-104