Remove a ton of public reexports

Remove most of the public reexports mentioned in #19253

These are all leftovers from the enum namespacing transition

In particular:

* src/libstd/num/strconv.rs
 * ExponentFormat
 * SignificantDigits
 * SignFormat
* src/libstd/path/windows.rs
 * PathPrefix
* src/libstd/sys/windows/timer.rs
 * Req
* src/libcollections/str.rs
 * MaybeOwned
* src/libstd/collections/hash/map.rs
 * Entry
* src/libstd/collections/hash/table.rs
 * BucketState
* src/libstd/dynamic_lib.rs
 * Rtld
* src/libstd/io/net/ip.rs
 * IpAddr
* src/libstd/os.rs
 * MemoryMapKind
 * MapOption
 * MapError
* src/libstd/sys/common/net.rs
 * SocketStatus
 * InAddr
* src/libstd/sys/unix/timer.rs
 * Req

[breaking-change]

Author: frewsxcv

src/compiletest/runtest.rs

@@ -1609,7 +1609,7 @@ fn _arm_exec_compiled_test(config: &Config,
                 stderr_out.as_slice());
 
     ProcRes {
-        status: process::ExitStatus(exitcode),
+        status: process::ProcessExit::ExitStatus(exitcode),
         stdout: stdout_out,
         stderr: stderr_out,
         cmdline: cmdline

src/libcollections/str.rs

@@ -51,7 +51,7 @@
 
 #![doc(primitive = "str")]
 
-pub use self::MaybeOwned::*;
+use self::MaybeOwned::*;
 use self::RecompositionState::*;
 use self::DecompositionType::*;
 
@@ -842,7 +842,7 @@ mod tests {
     use core::iter::AdditiveIterator;
     use super::{eq_slice, from_utf8, is_utf8, is_utf16, raw};
     use super::truncate_utf16_at_nul;
-    use super::{Owned, Slice};
+    use super::MaybeOwned::{Owned, Slice};
 
     #[test]
     fn test_eq_slice() {

src/libcollections/string.rs

@@ -26,7 +26,8 @@ use core::raw::Slice as RawSlice;
 
 use slice::CloneSliceExt;
 use str;
-use str::{CharRange, CowString, FromStr, StrAllocating, Owned};
+use str::{CharRange, CowString, FromStr, StrAllocating};
+use str::MaybeOwned::Owned;
 use vec::{DerefVec, Vec, as_vec};
 
 /// A growable string stored as a UTF-8 encoded buffer.

src/librustc/lint/builtin.rs

@@ -37,7 +37,7 @@ use util::nodemap::{FnvHashMap, NodeSet};
 use lint::{Context, LintPass, LintArray};
 
 use std::{cmp, slice};
-use std::collections::hash_map::{Occupied, Vacant};
+use std::collections::hash_map::Entry::{Occupied, Vacant};
 use std::num::SignedInt;
 use std::{i8, i16, i32, i64, u8, u16, u32, u64, f32, f64};
 use syntax::{abi, ast, ast_map};

src/librustc/metadata/creader.rs

@@ -23,7 +23,7 @@ use plugin::load::PluginMetadata;
 use util::nodemap::FnvHashMap;
 
 use std::rc::Rc;
-use std::collections::hash_map::{Occupied, Vacant};
+use std::collections::hash_map::Entry::{Occupied, Vacant};
 use syntax::ast;
 use syntax::abi;
 use syntax::attr;

src/librustc/metadata/loader.rs

@@ -228,7 +228,7 @@ use util::fs;
 
 use std::c_str::ToCStr;
 use std::cmp;
-use std::collections::hash_map::{Occupied, Vacant};
+use std::collections::hash_map::Entry::{Occupied, Vacant};
 use std::collections::{HashMap, HashSet};
 use std::io::fs::PathExtensions;
 use std::io;

src/librustc/middle/const_eval.rs

@@ -28,7 +28,7 @@ use syntax::visit::{mod, Visitor};
 use syntax::{ast_map, ast_util, codemap};
 
 use std::rc::Rc;
-use std::collections::hash_map::Vacant;
+use std::collections::hash_map::Entry::Vacant;
 
 //
 // This pass classifies expressions by their constant-ness.

src/librustc/middle/infer/freshen.rs

@@ -34,7 +34,7 @@ use middle::ty::{mod, Ty};
 use middle::ty_fold;
 use middle::ty_fold::TypeFoldable;
 use middle::ty_fold::TypeFolder;
-use std::collections::hash_map;
+use std::collections::hash_map::{mod, Entry};
 
 use super::InferCtxt;
 use super::unify::InferCtxtMethodsForSimplyUnifiableTypes;
@@ -67,8 +67,8 @@ impl<'a, 'tcx> TypeFreshener<'a, 'tcx> {
         }
 
         match self.freshen_map.entry(key) {
-            hash_map::Occupied(entry) => *entry.get(),
-            hash_map::Vacant(entry) => {
+            Entry::Occupied(entry) => *entry.get(),
+            Entry::Vacant(entry) => {
                 let index = self.freshen_count;
                 self.freshen_count += 1;
                 let t = ty::mk_infer(self.infcx.tcx, freshener(index));

src/librustc/middle/infer/region_inference/graphviz.rs

@@ -26,7 +26,7 @@ use session::config;
 use util::nodemap::{FnvHashMap, FnvHashSet};
 use util::ppaux::Repr;
 
-use std::collections::hash_map::Vacant;
+use std::collections::hash_map::Entry::Vacant;
 use std::io::{mod, File};
 use std::os;
 use std::sync::atomic;

src/librustc/middle/traits/fulfill.rs

@@ -12,7 +12,7 @@ use middle::infer::InferCtxt;
 use middle::mem_categorization::Typer;
 use middle::ty::{mod, Ty};
 use std::collections::HashSet;
-use std::collections::hash_map::{Occupied, Vacant};
+use std::collections::hash_map::Entry::{Occupied, Vacant};
 use std::default::Default;
 use std::rc::Rc;
 use syntax::ast;