What steps will reproduce the problem?
1. Have IPv6 address where one group is zero, eg 2001:db8:1234:0:216:3eff:feeb:5dce
2. Run `prosodyctl check`
What is the expected output?
What do you see instead?
example.com AAAA record points to unknown address 2001:db8:1234::216:3eff:feeb:5dce
What version of the product are you using? On what operating system?
Prosody 0.10 nightly build 430 (2017-09-25, 42fad8465537)
Ubuntu 14.04.5 LTS
Please provide any additional information below.
Note how the :0: group gets compressed to ::. This compression should not be done if there is only one group.