Proposition expandIncludes as number (includes limit)

[sla100]

I have proposition to add suuport "expandIncludes" option like number which means how many include queries are permited.

[pboyd04]

If I understand correctly, you'd like to stop expanding includes after a certain depth? or just stop after n number of includes?

[joksnet]

The limit of DNS queries should be at most 10 or fail if it has to do more. To prevent DDoS attacks.