update-a-x-i should not run under pbuilder and similar systems

[Junichi Uekawa]

> > 
> > man invoke-rc.d 
> > refers you to:
> > /usr/share/doc/sysv-rc/README.policy-rc.d
> > which is actually available in:
> > /usr/share/doc/sysv-rc/README.policy-rc.d.gz
> > (filed a bug here...)
> > So there is a documentation.
> 
> I had found that, which is what I used for the example above, but it
> doesn't give detailed instructions on how to invoke it, like what to do
> if the script is missing, or what constitutes an initscript ID. Also, I
> don't have a policy-rc.d that i could use to test my postinst.
> 
> If you could please test a-x-i from git, I'll upload as soon as you give
> me a go.

 .
 .
 .
Setting up apt-xapian-index (0.18) ...
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All rc.d operations denied by policy
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Processing triggers for python-support ...


it looks like it's working in the intended way...