Use host from the orignal hosts list when boreas is enabled (backport #725)

[mergify]

This is an automatic backport of pull request #725 done by Mergify.
Cherry-pick of 60c9777 has failed:

On branch mergify/bp/openvas-20.08/pr-725
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	both modified:   CHANGELOG.md
	both modified:   src/attack.c

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[ArnoStiefvater]

@Mergifyio refresh

[mergify]

Command refresh: success

Pull request refreshed