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-2024-23407

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CVE-2012-3772

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CVE-2021-23084

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CVE-2021-0130

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CVE-2021-43870

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CVE-2021-41574

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CVE-2021-41854

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CVE-2021-41979

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CVE-2021-33132

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CVE-2021-33066

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CVE-2021-33138

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CVE-2021-33100

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CVE-2021-33102

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CVE-2020-12580

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CVE-2020-2069

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CVE-2020-2062

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CVE-2020-24524

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CVE-2020-35536

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