Strip exif GPS data by default
Per #2158 (closed) I think it's important that stripping GPS location data is a default behavior of Pleroma. Now that I know, I will always enable this, but without the knowledge it's too easy for people to accidentally leak their location.
I understand there are challenges to this, like that Mogrify handles the color profile improperly. Personally I think that's well worth the trade-off. I suggest we let Mogrify be the default, and users can install exiftool if they want to fix the color issue. I'd much rather my users have slightly discolored photos than leak their location.