Add TLSARecord
Rename tlsa to lookup_tlsa_records
Fix mem leak
Use OpenSSL's free

Is free() most of the time but not always.
Rename LookupError and fix the corresponding test
Rename LookupError and fix the corresponding test
Fix remaining tests
Update some copyright headers
Fix ffi/gc for good
Check the server cert using matchesCertificate
Remove unused imports
Tests for GetdnsResponseError
Tests for TLSARecord with an incomplete failing test for matchesCertificate
Some tests for matchCertificate
Make lookup_tlsa_records return a list of records
Checkin the certificate blob
Make tests pass again