Rewrite fetchctx_t reference counting

Using proper attach/detach functions for the fetch context
instead of fctx_increference() and _decreference() makes
it easier to debug reference counting errors in the resolver.

Fixed several such errors that were found as a result.
This commit is contained in:
Ondřej Surý 2021-10-15 14:04:42 +02:00 committed by Evan Hunt
parent 8dd43a8fcd
commit d609425bf3

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