[HTTPS-E Rulesets] Exclusion regex ideas (ie: #6279)

[grarpamp]

> And ideas on how to exclude hosts from being remapped?

Oops, just saw this. Guessing it will work for the above.
<exclusion pattern="^http://action\.eff\.org/" />

Leaves just the below questions.

> When a site has many hosts, the majority of which are
> https, one would want to use '*' mapping. Especially to
> catch hosts that they are unaware of or that may appear
> later. But of course some hosts may need to be excluded.
>
> I did not see any docs regarding grouping of '<target's
> under a '<ruleset'. Nor anything about rule evaluation
> order. Or about more specific order of precedence.
> At least so far. Any ideas we can use for this?
>
> https://trac.torproject.org/projects/tor/ticket/6279