Add support for Happy Eyeballs (rfc8305)

[normanmaurer]

https://tools.ietf.org/html/rfc8305

[exceptionplayer]

As IPv6 is becoming more and more popular...

[normanmaurer]

Related to happy eyeballing there is the problem that Bootstrap.connect(...) would race different connect attempts and so a handler may be added to multiple pipelines. We need to guard against problems here.

[exceptionplayer]

Is there any plan or a deadline for this?

[normanmaurer]

@medusar its on the to do list... this is all I can say atm. That said I will not have time to work on this any time soon.

[johnou]

@medusar if you are in a rush pull requests are welcome :)

[exceptionplayer]

@normanmaurer ok, thanks.
@johnou I would love to, but i am not sure if i can do it well. I will try to implement this in my own projects and then let's see if i can make a pull request.

[normanmaurer]

Alright.... working on it.

[johnou]

@normanmaurer april fools? :)

[amilcar-andrade]

@normanmaurer small question for you. Is Happy Eyeball's support going to be in the 4.1.49 released or that would be in the 5.0.0 one? Thanks in advance.