v2.8.0

This release brings a handful of random bug fixes: two unrelated access control list fixes, a fix around web app crashes for languages with underscores in the language code (e.g. zh_Hant, zh_Hans, pt_BR, ...), a workaround for the Priority header (often used in Cloudflare setups), and support among others support for HTML-only emails (finally), web app crash fixes

Bug fixes + maintenance:

• Support for HTML-only emails (#690/#693, thanks to @teastrainer and @CrazyWolf13 for reporting)
• Fix ACL issue with topic patterns containing underscores (#840, thanks to @Joe-0237 for reporting)
• Fix ACL issue with order of read/write rules (#914/#917, thanks to @sandman7920)
• Re-add tzdata to Docker images for amd64 image (#894, #307)
• Add special logic to ignore Priority header if it resembles an RFC 9218 value (#851/#895, thanks to @gusdleon, see also #351, #353, #461)
• PWA: hide install prompt on macOS 14 Safari (#899, thanks to @nihalgonsalves)
• Fix web app crash in Edge for languages with underline in locale (#922/#912/#852, thanks to @imkero)

Additional languages:

• Finnish (thanks to @Seppo)