Merge pull request #2560 from Habbie/more-dnsname

Merge pull request #2560 from Habbie/more-dnsname

This is the first round of DNSName work for all products. Some things are broken now but many things work. The notes below will go into a new ticket to track the next round.

Early on this branch are a few 'yolo' and 'snap' commits. Those have not been squashed because they are not specific units of work, just ongoing refactoring.

Status update below written by @mind04, thanks!

Current status:
- dnsdist disabled in travis
- lmdb disabled in travis (current lmdb keys are useless with dnsname, postpone lmdb fixes to dnsname round 2)
- api tests disabled in travis, for now

Auth:
- [ ] lmdb
- [ ] api
- [x] remote backend *-dnssec
- [ ] tools

Tests:
- [ ] make check (test-dnsrecords_cc)
- [ ] regressiontests.nobackend (lua policy)

Recursor:
- [ ] api
- [ ] freezes after the first parse failure in DNSName (runtime_error Unable to parse DNS name)

Other areas of interest:
- [ ] mixed case queries
- [ ] use dnsname for before and afternames (dnssec)
- [ ] ...