Add CheckAddrWithOptions method with IPv4/IPv6 and socket mark support

[Lan-ce-lot]

Does this pull request fix one issue?

Fix #30

Describe how you did it

• Created CheckAddrWithOptions(addr, opts) method
• Enhanced [parseSockAddr] to support network parameter (tcp, tcp4, tcp6)
• Added SO_MARK socket option support for Linux

Describe how to verify it

// IPv4 only
opts := tcp.DefaultOptions().WithNetwork("tcp4")
checker.CheckAddrWithOptions("google.com:80", opts)

// IPv6 only
opts := tcp.DefaultOptions().WithNetwork("tcp6") 
checker.CheckAddrWithOptions("google.com:80", opts)

// Run tests
go test -v ./...

[Lan-ce-lot]

I passed the CI in my own repo. PTAL @tevino

[tevino]

@Lan-ce-lot Thanks for your work, I'll be mostly AFK for the next week or so, but I’ll definitely check in after that!