Add a generic HTML cleaning service

This will be able to be used by all components that need to display untrusted HTML: including HTML attachments, RSS feeds, and the html-include macro...

Multiple gnuts bugs

Multiple buffer overflows in different components...

CVE-2022-29921

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CVE-2021-33102

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CVE-2018-4829

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CVE-2021-23092

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CVE-2025-2718

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CVE-2021-0014

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CVE-2018-4528

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CVE-2021-32910

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CVE-2013-5290

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CVE-2018-4582

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CVE-2019-16848

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CVE-2024-5398

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CVE-2019-14641

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CVE-2022-40573

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CVE-2020-12539

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CVE-2022-32676

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CVE-2019-16825

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CVE-2022-36406

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