Created attachment 154300 [details]
Adds the AAAA_FILTER option to the config menu, along with patching from the file contrib/aaaa-filter-iterator.patch which is in the unbound source

I have developed a patch recently to implement within unbound functionality similar to BIND's "filter-aaaa" option.
This feature not being readily available is one major reason Japanese ISPs can not leave BIND behind.
(Physical carriers such as NTT roll out their own in-house closed IPv6 routing, over which ISPs have no control, if they don't themselves provide IPv6 service to the customers)

It has been included in unbound's contrib/ starting with the latest version (1.5.1), but was initially developped for version 1.4.17.
The patch applies properly on any version above so far, so I was thinking adding a Makefile option, and a clause in the "post-patch:" section to apply it.

I have included a proposal of Makefile, along with a diff explaining what changes I have done.
I am willing to provide whatever help is required.

I was also wondering one thing, since the binaries generated will
ultimately be quite different, should the option alter the package name?

I have not done so, but I fear a miscalculated port update after tuning
repositories might have dramatic effects, so I thought one way to avoid
the headache would be to have a different package name.

Thanks in advance for your time,