Slug for attached posts by image galleries

Slug4apig (Slug for attached posts from image galleries) is probably the simplest plugin ever seen, though of
imperative need for the WordPress community.

This plugin just adds a field to each image inserted through the WordPress built-in gallery interface. As easy as you edit
the name, description, etc. for each image, with Slug4apig you will be able to edit the friendly URL (aka slug)
and set the desired value.

By default, the WordPress built-in gallery will set the attachment post’s slug to the name of the image you inserted in
the gallery (minus .extension). This is a rather restrictive approach, as your images may have sequencial names
assigned automatically by the photo camera, like “S4100001.JPG”.

In the previous example, an autocreated attachment post would be cr…