Correct depth increments.

Correct depth increments.

With the introduction of qname minimization, a function
doResolveNoQNameMinimization() was introduced. This function is
called by doResolve() with depth incremented. Due to the recursive
nature of the resursor algortihm (Nomen est Omen) we end up
incrementing the depth too much. This prompted a review of the other
places depth was incremented, and I believe it should only be done
when calling doResolve(). Especially the case "+ 2" in the getAddrs()
call looks strange to me, as the doResolve() calls in getAddrs()
already call doResolve() with depth + 1.

This fixes #9184 and likely other cases of deep recursion caused
by long CNAME chains.