clarify documentation of TcpStream::connect() for multiple valid addresses

[benaryorg]

I am not sure how the UDP part of the stdlib behaves when passing multiple valid addresses, but it should be mentioned as there are legit use cases for impl<'a> ToSocketAddrs for &'a [SocketAddr], a TCP fallback only being one.

Just a little example program for anyone willing to enhance the documentation further:

use std::net::SocketAddr;use std::net::ToSocketAddrs;use std::net::TcpStream;fnmain(){let v:Vec<SocketAddr> = vec!["127.0.0.1:1338".to_socket_addrs().unwrap().next().unwrap(),"127.0.0.1:1337".to_socket_addrs().unwrap().next().unwrap(),"127.0.0.1:1339".to_socket_addrs().unwrap().next().unwrap(),];let stream = TcpStream::connect(&v[..]).unwrap();}

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @aturon (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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[alexcrichton]

@bors: r+ 68a18c4 rollup

Thanks!

[bors]

⌛ Testing commit 68a18c4 with merge 061cff6...

[bors]

💔 Test failed - auto-win-msvc-64-cargotest

[alexcrichton]

@bors: retry

On Sun, Apr 24, 2016 at 4:46 AM, bors notifications@github.com wrote:

[image: 💔] Test failed - auto-win-msvc-64-cargotest
http://buildbot.rust-lang.org/builders/auto-win-msvc-64-cargotest/builds/225

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#33167 (comment)