Bug fixes and Improvements, mostly in dnsping

What's Changed

• Add RFC5001 NSID support (-n or --nsid)
• Display RFC8914 Extended DNS Errors when available (-E or --ede)
• Add ability to override default RR class (-C or --class)
• Display response TTL if applicable (-L or --ttl)
• Display first answer in RRSET, when available (-a or --answer)
• Add -x to display extra/expert information, implying Flags, EDE and
  TTL
• Display EDNS flags alongside other response flags, when available
• Always display RCODE with responses
• Add more resolvers to the default list
• Lots of bug fixes and UX improvements
• Change default behavior of --edns to disabled by default
• Always display flags in brackets

Full Changelog: v2.1.0...v2.5.0