Octodns

* Zone name validation checking for double dots, and throwing InvalidNameError
rather than base Exception
* Record validation checks for double dots in names
* MetaProcessor.include_extra to add support for arbitrary extra values to be
set on the meta record.
* Correctly handled quoted svcparams when parsing SVCB/HTTPS rdata text
* Fix handling of chunked values (TXT, SPF) when escaped characters land at the
split boundaries, don't split escapes from their following chars

* Add `name` to Change.data, and thus PlanJson output

* ICMP & UDP healthcheck protocol support added
* Improved handling of present, but empty/None config file values.
* Add PlanJson plan_output support
* Include `record_type` in Change data

* Add support for SVCB and HTTPS records
* Allow DS records to be specified for managed sub-zones, same as NS
* Fix CAA rdata parsing to allow values with tags

* Support for specifying per-zone change thresholds, to allow for zones
where lots of changes are expected frequently to live along side zones
where little or no churn is expected.
* AutoArpa gained support for prioritizing values
* Fix for EnsureTrailingDots reverting value types back to strings which then
failed when rr methods were used on them (e.g. w/octodns-bind)

* Fix env var type handling that was previously fixed in 1.5.1 and then
regressed in 1.6.0.