Redo usage=3 checks, set SNI, omit hostname mismatch checks per spec.
Redo usage=3 checks, set SNI, omit hostname mismatch checks per spec.

Acidburn0zzz/getdns-python-bindings,getdnsapi/getdns-python-bindings,getdnsapi/getdns-python-bindings,Acidburn0zzz/getdns-python-bindings