docs: Improve netbase comments
docs: Improve netbase comments

- Improve and add various Lookup* docs
- Improve InterruptibleRecv docs
- Improve Socks5 docs
- Add CreateSocket docs
- Add ConnectSocketDirectly docs
- Add SetNameProxy docs
- Add ConnectThroughProxy docs
- Add LookupSubNet docs


Former-commit-id: 63574f15ca6681740a9906234d5c15e68c36fd9c
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin