The period between the most significant nibble of the encoded IPv4 address and the 2.0.0.2.IP6.ARPA suffix was missing resulting in the wrong name being checked. Add system test for 6to4-self implementation.
Closes #4766
Merge branch '4766-add-system-test-for-6to4-self' into 'main'
Closes #4766
See merge request isc-projects/bind9!9099