Consider removing link-config

[thehydroimpulse]

If we want to be compatible with the stable Rust 1.0, we won't be able to depend on or use syntax extensions, which link-config is composed of. Not to mention it's breaking every other day because of the compiler churn.

[jimfleming]

👍 for this. Just tried using nanomsg.rs today: alexcrichton/link-config#18

[thehydroimpulse]

@jimfleming We have a 1.0 branch that is fully functioning right now. I'm thinking of just making that the master branch and pushing to crates.io (which removes link-config)

[jimfleming]

Great, thanks. I'll switch to that branch for now.

[blabaere]

In this situation, we submit a PR to the link-config maintainer with the simplest fix possible, and he usually merges it in the following minute.