dns: report out of memory properly
This addresses a part of a TODO by properly reporting an out of
memory error to the user instead of reporting ENOTFOUND
.
I only changed this single entry as this is super rare and should be safe
to change.
Since it is a OOM, we also have no test for it.
The other two are likely used a lot and a lot of userland code will rely on that.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines