Redmine ticket: #8261
According to [1], the within pointer (if combined with distance)
includes the distance pointer, which is not clearly visible in the
graphic.
Fixed this in a new graphic by some GIMP arts.
PS: Special thanks to one of our team members Annika C. for initially
spotting this!
[1] https://forum.suricata.io/t/is-within-affected-by-distance/1688