When NOTIMPL or FORMERR is encountered, disable QNAME minimization

first, and disable EDNS in a second round.  This adds some latency
(one more roundtrip), but it's safer to not drop EDNS0 on a first
failure.
3 jobs for <span class="ref-name">disable-qname-min-on-notimpl</span> in 1 minute and 46 seconds
Status Job ID Name Coverage
  Build
passed #1537
docker linux amd64
build:linux:amd64

00:00:29

 
  Test
passed #1539
docker linux amd64
deckard:linux:amd64

00:00:54

passed #1538
docker linux amd64
test:linux:amd64

00:00:22