This will stop eio threads for both the client (`fdb_stop_network()`)
and the server. This change is being done more for the former, but I
don't see any harm in doing the latter as well.
- Some Linux filesystems don't support O_DIRECT which is required by
Kernel AIO to function properly. Instead of using O_SYNC, EIO is
much better options in terms of performance penalty.
- Some systems may not support AIO at all. Eg. Windows Subsystem for
Linux.
FIXES#842
RELATED #274
Remove the use of relative paths. A header at foo/bar.h could be included by
files under foo/ with "bar.h", but would be included everywhere else as
"foo/bar.h". Adjust so that every include references such a header with the
latter form.
Signed-off-by: Robert Escriva <rescriva@dropbox.com>
