Subject: application/x-perl is missing

From: 積丹尼 Dan Jacobson <[email-masked]>
Date: Tue, 19 Oct 2021 15:50:16 +0800

C-c C-a runs the command mml-attach-file.
When we get to
   Content type (default application/octet-stream): application/x-p<TAB>
application/x-perl is missing.
https://reposcope.com/mimetype/application/x-perl