Keep acronyms all upper-case

[jakebolewski]

Renames TcpSocket, UdpSocket, IpAddr to follow upper case acronym convention in base. #8165

[jakebolewski]

UDPSocket is exported but TCPSocket is not. Should both be exported?

[Keno]

The reason we don't export TCPSocket is because there's no reason to construct it. In practice though, I think people embedding tcpsockets into their types is reason enough to export it.

[StefanKarpinski]

Let's export it for consistency.

[ivarne]

Would some sort of depreciation be relevant for this?

[StefanKarpinski]

Unfortunately names are pretty hard to deprecate. Since 0.4 is going to be massively breaking, I think we can maybe just do the rename and packages that want to be 0.3-0.4 portable can just deal with it. Although it might be interesting to have some mechanism for allowing package to use the 0.4 idioms in a way that will continue to work on 0.3.

[ivarne]

An alias for compatibility seems simple and better than nothing. We can also backport the new names as aliases in 0.3.1 so that stable master compatibility becomes less of a hassle.

[JeffBezanson]

+1

I would add const aliases to deprecated.jl anyway, which we've done in the past. It's helpful to have a summary of changed names in one place, and also smooths the transition.

[IainNZ]

So those get removed when we tag 0.5-something wright?