The systems administrator can optionally provide site-specific
revisions of upstream hooks by placing them in the directory
/etc/xen-tools/hooks.d/ as a method for disabling hooks, adding
site-specific extra features that don't get overwritten on upgrades,
or patching bugs early.
Signed-off-by: Adrian C. (anrxc) <anrxc@sysphere.org>
4505f7e141