[PATCH] fetchzone.c: fix AAAA records

[Corey Hickey]

Hi,

I noticed that fetchzone is concatenating two parts of AAAA records
together, without a ':' where it should be.

bugfood.fatooh.org. +300 aaaa 2001:470:805b:122cf:30ff:fe10:2dfc: ~
                                            ^^^^^
...instead of:
bugfood.fatooh.org. +300 aaaa 2001:470:805b:1:22cf:30ff:fe10:2dfc: ~
                                            ^^^^^^
This seems to just be a typo in a printf format string. Here's a patch
to fix it, assuming I'm not missing something.

Thanks,
Corey