Regression fix: Handle dstdomain duplicates and overlapping names better

Regression fix: Handle dstdomain duplicates and overlapping names better

Since 3.2 changes to dstdomain overlap detection teh case of duplicate
wildcards has become a fatal error needlessly.

This silently ignores all exact duplicates, even if they are wildcards.

Also, adjust the message display to always display the longer of the
domains first. Since we are dealing with sub-domains it is the most
reliable indicator of which should be removed to safely fix the detected
issue.