If a packager wants to be able to support addititional arguments on his
hook this will allow them to setup the configuration with these arguments.
For example this would allow a hook developer to add support for a --debug
flag to change the level of debugging in his hook.
In order to complete this task, I had to vendor in the latest
github.com://opencontainers/runtime-tools, which caused me to have to fix a
Mount and Capability interface calls
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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