v2024.07.20

Upstream changes

• Merge branch 'bugfix/optional-alpine-mirror' into 'master'
• Fix breakage when 'ALPINE_MIRROR' is not provided.
• support optional mirror for alpine
• Merge branch 'bugfix/add-sessions-to-autoloader' into 'master'
• Add the 'Sessions' class to the autoloader.
• Merge branch 'feature/php84-session_set_save_handler' into 'master'
• Merge branch 'weblate-integration' into 'master'
• update CONTRIBUTING
• Translated using Weblate (Portuguese (Portugal))
• Translated using Weblate (Chinese (Traditional))
• Move side effects out of the 'Sessions' constructor.
• Add and use the 'Sessions' class.
• Switch to the non-deprecated form of 'session_set_save_handler'.