v1.5.1

• ACL: Fix "acl rule get" embed
• Admin: "system shutdown" & "system restart" commands
• Animals: Detect reverts to default avatar
• Anonsend: Do not guard 'anonsend link' by ACL
• Anonsend: Add missing string
• Base: Fix pinning error while logging
• Base: Catch DM errors in bookmarks
• Librarian: Fix 'macaddress' throwing errors
• Meme: Include user avatar in 'relations' embed
• Roles: Fix react-to-role resolver when the line only has one word
• Roles: Alter react-to-role discovery
• Verify: Allow dash in e-mail