Add an Xs module.

This exposes the same interface as that in the Mirage-xen Xs module

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Merge pull request #3 from jonludlam/add-xs

Add an Xs module.
When connect fails, close the file descriptor

Signed-off-by: David Scott <dave.scott@citrix.com>
Release 0.9.3

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #4 from djs55/fix-leak

Fix fd leak (when connections fail)