resolved: reduce the maximum nsec3 iterations to 100

resolved: reduce the maximum nsec3 iterations to 100

According to RFC9267, the 2500 value is not helpful, and in fact it can
be harmful to permit a large number of iterations. Combined with limits
on the number of signature validations, I expect this will mitigate the
impact of maliciously crafted domains designed to cause excessive
cryptographic work.

Gbp-Pq: Name 0003-resolved-reduce-the-maximum-nsec3-iterations-to-100.patch