There's a number of places where we create/have .htaccess files with "Deny from all", which was deprecated in Apache 2.4 (initially released in 2012). The replacement appears to be "Require all denied".
This was originally filed as https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1064797.
Change #1013701 had a related patch set uploaded (by Legoktm; author: Legoktm):
[mediawiki/core@master] Update Apache config syntax in .htaccess files
Change #1013702 had a related patch set uploaded (by Legoktm; author: Legoktm):
[mediawiki/vendor@master] Update Apache config syntax in .htaccess files
Change #1013701 merged by jenkins-bot:
[mediawiki/core@master] Update Apache config syntax in .htaccess files
Change #1013702 merged by jenkins-bot:
[mediawiki/vendor@master] Update Apache config syntax in .htaccess files
Change #1014067 had a related patch set uploaded (by Reedy; author: Legoktm):
[mediawiki/vendor@REL1_41] Update Apache config syntax in .htaccess files
Change #1014068 had a related patch set uploaded (by Reedy; author: Legoktm):
[mediawiki/vendor@REL1_40] Update Apache config syntax in .htaccess files
Change #1014069 had a related patch set uploaded (by Reedy; author: Legoktm):
[mediawiki/vendor@REL1_39] Update Apache config syntax in .htaccess files
Change #1014070 had a related patch set uploaded (by Reedy; author: Legoktm):
[mediawiki/core@REL1_41] Update Apache config syntax in .htaccess files
Change #1014071 had a related patch set uploaded (by Reedy; author: Legoktm):
[mediawiki/core@REL1_40] Update Apache config syntax in .htaccess files
Change #1014072 had a related patch set uploaded (by Reedy; author: Legoktm):
[mediawiki/core@REL1_39] Update Apache config syntax in .htaccess files
Change #1014067 merged by Zabe:
[mediawiki/vendor@REL1_41] Update Apache config syntax in .htaccess files
Change #1014069 merged by Zabe:
[mediawiki/vendor@REL1_39] Update Apache config syntax in .htaccess files
Change #1014068 merged by Zabe:
[mediawiki/vendor@REL1_40] Update Apache config syntax in .htaccess files
Change #1014072 merged by jenkins-bot:
[mediawiki/core@REL1_39] Update Apache config syntax in .htaccess files
Change #1014070 merged by jenkins-bot:
[mediawiki/core@REL1_41] Update Apache config syntax in .htaccess files
Change #1014071 merged by jenkins-bot:
[mediawiki/core@REL1_40] Update Apache config syntax in .htaccess files
Change #1091916 had a related patch set uploaded (by Fomafix; author: Fomafix):
[mediawiki/extensions/MobileFrontend@master] Update Apache config syntax in .htaccess files
Change #1091918 had a related patch set uploaded (by Fomafix; author: Fomafix):
[mediawiki/skins/MinervaNeue@master] Update Apache config syntax in .htaccess files
Change #1091919 had a related patch set uploaded (by Fomafix; author: Fomafix):
[mediawiki/extensions/Flow@master] Update Apache config syntax in .htaccess files
Change #1091920 had a related patch set uploaded (by Fomafix; author: Fomafix):
[mediawiki/extensions/Popups@master] Update Apache config syntax in .htaccess files
Change #1091921 had a related patch set uploaded (by Fomafix; author: Fomafix):
[mediawiki/extensions/WikimediaMaintenance@master] Update Apache config syntax in .htaccess files
Change #1091918 merged by jenkins-bot:
[mediawiki/skins/MinervaNeue@master] Update Apache config syntax in .htaccess files
Change #1091920 merged by jenkins-bot:
[mediawiki/extensions/Popups@master] Update Apache config syntax in .htaccess files
Change #1091916 merged by jenkins-bot:
[mediawiki/extensions/MobileFrontend@master] Update Apache config syntax in .htaccess files