Dnsruby release v1.72.3

Dnsruby release v1.72.1

Dnsruby version 1.71.0

Remove unused net-ftp dependency

release v1.61.8

v1.61.7 release

* RD bit not set on Recursor queries (thanks Sean Dilda!)

* Handle quoted strings followed by unquoted strings in TXT records
* do not worry about rogue repeated Ids - just log an error and get on with life
* Clear Ruby warnings
* Use GitHub Actions rather than Travis