GitLab

Added ".jif" as optional JPEG extension.
Added fits since ChangeFSI can open them.
Added prs.btif as a registered TIFF variant, though very unlikely to occur in the wild.
Renamed image/svg to its W3C and IANA registration.
Removed image/photo-cd due to no search engine hits (for a punctuation preserving search) and not IANA recognised.
Corrected typo in xpng to x-png.
Added vnd.dxf & vnd.microsoft.icon & vnd-wap-wmbp & vnd.adobe.photoshop as these have RISC OS file types and IANA registrations.
Added image/bmp reluctantly with notes about which are official or not.
Removed x-MS-bmp as x-ms-bmp covers it (MimeMap is case insensitive).
Removed duplicates of x-photo-cd and x-xpixmap.

Unrelated, added text/csv in passing.

Version 5.54. Tagged as 'Internet-5_54'