AVIF is commonplace enough now (93.98% according to caniuse.com) that
let's add it here so that administrators don't need to add it
themselves.
---
 share/misc/mime.types | 1 +
 1 file changed, 1 insertion(+)

diff --git a/share/misc/mime.types b/share/misc/mime.types
index 19637bf05..cb9a389f0 100644
--- a/share/misc/mime.types
+++ b/share/misc/mime.types
@@ -66,6 +66,7 @@ audio/ogg						ogg
 audio/x-m4a						m4a
 audio/x-realaudio					ra
 
+image/avif						avif
 image/gif						gif
 image/jpeg						jpeg jpg
 image/png						png
-- 
2.51.1