Switch to purely namespaced enums

This breaks code that referred to variant names in the same namespace as
their enum. Reexport the variants in the old location or alter code to
refer to the new locations:

```
pub enum Foo {
    A,
    B
}

fn main() {
    let a = A;
}
```
=>
```
pub use self::Foo::{A, B};

pub enum Foo {
    A,
    B
}

fn main() {
    let a = A;
}
```
or
```
pub enum Foo {
    A,
    B
}

fn main() {
    let a = Foo::A;
}
```

[breaking-change]

5 files changed, 18 insertions, 0 deletions

diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index 66c29db0455..33db3c37666 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -221,6 +221,12 @@ responding to errors that may occur while attempting to read the numbers.
 #![experimental]
 #![deny(unused_must_use)]
 
+pub use self::SeekStyle::*;
+pub use self::FileMode::*;
+pub use self::FileAccess::*;
+pub use self::FileType::*;
+pub use self::IoErrorKind::*;
+
 use char::Char;
 use clone::Clone;
 use default::Default;
@@ -1899,6 +1905,7 @@ impl fmt::Show for FilePermission {
 
 #[cfg(test)]
 mod tests {
+    use self::BadReaderBehavior::*;
     use super::{IoResult, Reader, MemReader, NoProgress, InvalidInput};
     use prelude::*;
     use uint;
diff --git a/src/libstd/io/net/addrinfo.rs b/src/libstd/io/net/addrinfo.rs
index 22775d54eff..13f602de03a 100644
--- a/src/libstd/io/net/addrinfo.rs
+++ b/src/libstd/io/net/addrinfo.rs
@@ -19,6 +19,10 @@ getaddrinfo()
 
 #![allow(missing_docs)]
 
+pub use self::SocketType::*;
+pub use self::Flag::*;
+pub use self::Protocol::*;
+
 use iter::Iterator;
 use io::{IoResult};
 use io::net::ip::{SocketAddr, IpAddr};
diff --git a/src/libstd/io/net/ip.rs b/src/libstd/io/net/ip.rs
index 7ba5e173182..d87768a0860 100644
--- a/src/libstd/io/net/ip.rs
+++ b/src/libstd/io/net/ip.rs
@@ -15,6 +15,8 @@
 
 #![allow(missing_docs)]
 
+pub use self::IpAddr::*;
+
 use fmt;
 use io::{mod, IoResult, IoError};
 use io::net;
diff --git a/src/libstd/io/process.rs b/src/libstd/io/process.rs
index 5b5bb618151..16e568f30f2 100644
--- a/src/libstd/io/process.rs
+++ b/src/libstd/io/process.rs
@@ -13,6 +13,9 @@
 #![allow(experimental)]
 #![allow(non_upper_case_globals)]
 
+pub use self::StdioContainer::*;
+pub use self::ProcessExit::*;
+
 use prelude::*;
 
 use fmt;
diff --git a/src/libstd/io/stdio.rs b/src/libstd/io/stdio.rs
index 00d62f389ca..362e80f9f12 100644
--- a/src/libstd/io/stdio.rs
+++ b/src/libstd/io/stdio.rs
@@ -27,6 +27,8 @@ out.write(b"Hello, world!");
 
 */
 
+use self::StdSource::*;
+
 use failure::local_stderr;
 use fmt;
 use io::{Reader, Writer, IoResult, IoError, OtherIoError,