Fix comment on gravity-db.c

[rdwebdesign]

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In gravity-db.c, the comment explaining how the wildcard character works when adding audit domains is wrong.

The text says *google.de matches other domains starting in google.de, like abcgoogle.de.
This is clearly wrong, since abcgoogle.de ends with the matching text.
The PR fixes the comment.

This template was created based on the work of udemy-dl.

The base branch was changed.