Add new extra functions getdns_yaml2(dict|list|bindata|value)(). These are like their getdns_str2() counterparts, but take YAML input rather than JSON.
YAML introduces a new dependency, on libyaml. YAML can be disabled at configuration time, in which case the dependency is removed.
Modify getdns_query such that if a configuration file name includes ".yaml" it will be processed as a YAML configuration, not a JSON configuration.
Internally, getdns_yaml2*() work by passing the YAML string through a simple translation to JSON. At present, this translation assumes that configuration is the only use case, and so will error if the outer layer of the YAML input is not a map. This in effect means that at present all getdns_yaml2*() functions apart from getdns_yaml2dict() will give an error on the YAML translation to JSON.
Willem Toorop
Jim Hague