Correctly handle imgur

https://github.com/colmmacc/cat-dns/commit/3571e862ab3a8b9b93dd1e435059b86a6f5a6e58
updated cat-dns to use label compression, but this breaks imgur resolution. This
commit uses the uncompressed question name instead of the answer name to fix this.

See https://github.com/notwaldorf/cat-dns/pull/8 for discussion of the problem