Upgrade to test8 release, bringing these upstream fixes:
ee41586 Use DS records as trust anchors, not DNSKEYs.
83349b8 Further tidying of AD and DO bit handling.
7fa836e Handle validation when more one key is needed.
1633e30 Fix Byte-order botch: broke DNSSEC on big-endian platforms.
c8ca33f Fix DNSSEC caching problems: incomplete RRSIG RRsets.
e243c07 AD bit in queries handled as RFC6840 p5.7