Support BIND views and/or tinydns locations about nictool HOT 6 OPEN

Zones and records already have a field for storing locations. The tinydns exports will include the location information in the exports.

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The Location field is now exposed in NicTool Client.

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Is this feature supported on BIND DNS exports?

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The next step for this would be to allow to create records using locations in the client. Specifically, if you try to add a second record where the only difference is the location, eg:
www.domain.com A 123.123.123.123 location1
www.domain.com A 123.123.123.123 location2

Then you get the error:

Duplicate Resource Records are not allowed: RFC 2181
multiple CNAME records with the same name are NOT allowed. (use plain old round robin)
record test already exists within zone as an (CNAME) record: RFC 1034, 2181, & 4035

From initial checks, it looks like the correct place to "fix" this is server/lib/NicToolServer/Zone/Record/Sanity.pm in _duplicate_record.
From my limited perl skills, I'm thinking something like an extra grep to only include records that have a matching location (even if the location is null).
Or, the other option would be an extra exclusion below to check if the type is one of (whichever records are permitted to have a location, such as A/CNAME at least) and then permit duplicates if the location is different.

I'm happy to try to create a patch, but TBH my perl was never really great, but if someone can provide some hints, then I'd be happy to give it a go, and do some testing.

I'm happy to leave adding locations manually via the Makefile, but the above needs to be fixed, and preferably display the location with view of records so you can easily see why there are duplicates.

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From my limited perl skills, I'm thinking something like an extra grep to only include records that have a matching location (even if the location is null).

Yep, that'd be the correct solution.

preferably display the location with view of records

I'd also be fine with showing the location, but only when the zone contains records with a location.

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Knot also has GeoIP location support.

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