v6.6.0

Main changes:

• Cache more types of RR
• Cache IPv4 and IPv6 in raw
• Increase socket buffer size from 2k to 4k
• Improve CacheHT dispatching
• Add PROTOCOL type * for GroupFile
• Domain match * is with lower priority than conditional match
• Show more RR type info

Full Changelog: v6.5.4...v6.6.0