std: Stabilize APIs for the 1.16.0 release

This commit applies the stabilization/deprecations of the 1.16.0 release, as
tracked by the rust-lang/rust issue tracker and the final-comment-period tag.

The following APIs were stabilized:

* `VecDeque::truncate`
* `VecDeque::resize`
* `String::insert_str`
* `Duration::checked_{add,sub,div,mul}`
* `str::replacen`
* `SocketAddr::is_ipv{4,6}`
* `IpAddr::is_ipv{4,6}`
* `str::repeat`
* `Vec::dedup_by`
* `Vec::dedup_by_key`
* `Result::unwrap_or_default`
* `<*const T>::wrapping_offset`
* `<*mut T>::wrapping_offset`
* `CommandExt::creation_flags` (on Windows)
* `File::set_permissions`
* `String::split_off`

The following APIs were deprecated

* `EnumSet` - replaced with other ecosystem abstractions, long since unstable

Closes rust-lang#27788
Closes rust-lang#35553
Closes rust-lang#35774
Closes rust-lang#36436
Closes rust-lang#36949
Closes rust-lang#37079
Closes rust-lang#37087
Closes rust-lang#37516
Closes rust-lang#37827
Closes rust-lang#37916
Closes rust-lang#37966
Closes rust-lang#38080

src/libcollections/enum_set.rs

@@ -17,6 +17,8 @@
             reason = "matches collection reform specification, \
                       waiting for dust to settle",
             issue = "37966")]
+#![rustc_deprecated(since = "1.16.0", reason = "long since replaced")]
+#![allow(deprecated)]
 
 use core::marker;
 use core::fmt;

src/libcollections/lib.rs

@@ -79,6 +79,7 @@ pub use btree_set::BTreeSet;
 #[doc(no_inline)]
 pub use linked_list::LinkedList;
 #[doc(no_inline)]
+#[allow(deprecated)]
 pub use enum_set::EnumSet;
 #[doc(no_inline)]
 pub use vec_deque::VecDeque;

src/libcollections/str.rs

@@ -1607,7 +1607,6 @@ impl str {
     /// Basic usage:
     ///
     /// ```
-    /// # #![feature(str_replacen)]
     /// let s = "foo foo 123 foo";
     /// assert_eq!("new new 123 foo", s.replacen("foo", "new", 2));
     /// assert_eq!("faa fao 123 foo", s.replacen('o', "a", 3));
@@ -1617,13 +1616,10 @@ impl str {
     /// When the pattern doesn't match:
     ///
     /// ```
-    /// # #![feature(str_replacen)]
     /// let s = "this is old";
     /// assert_eq!(s, s.replacen("cookie monster", "little lamb", 10));
     /// ```
-    #[unstable(feature = "str_replacen",
-               issue = "36436",
-               reason = "only need to replace first N matches")]
+    #[stable(feature = "str_replacen", since = "1.16.0")]
     pub fn replacen<'a, P: Pattern<'a>>(&'a self, pat: P, to: &str, count: usize) -> String {
         // Hope to reduce the times of re-allocation
         let mut result = String::with_capacity(32);
@@ -1795,11 +1791,9 @@ impl str {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(repeat_str)]
-    ///
     /// assert_eq!("abc".repeat(4), String::from("abcabcabcabc"));
     /// ```
-    #[unstable(feature = "repeat_str", issue = "37079")]
+    #[stable(feature = "repeat_str", since = "1.16.0")]
     pub fn repeat(&self, n: usize) -> String {
         let mut s = String::with_capacity(self.len() * n);
         s.extend((0..n).map(|_| self));

src/libcollections/string.rs

@@ -1166,18 +1166,14 @@ impl String {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(insert_str)]
-    ///
     /// let mut s = String::from("bar");
     ///
     /// s.insert_str(0, "foo");
     ///
     /// assert_eq!("foobar", s);
     /// ```
     #[inline]
-    #[unstable(feature = "insert_str",
-               reason = "recent addition",
-               issue = "35553")]
+    #[stable(feature = "insert_str", since = "1.16.0")]
     pub fn insert_str(&mut self, idx: usize, string: &str) {
         assert!(self.is_char_boundary(idx));
 
@@ -1270,7 +1266,6 @@ impl String {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(string_split_off)]
     /// # fn main() {
     /// let mut hello = String::from("Hello, World!");
     /// let world = hello.split_off(7);
@@ -1279,7 +1274,7 @@ impl String {
     /// # }
     /// ```
     #[inline]
-    #[unstable(feature = "string_split_off", issue = "38080")]
+    #[stable(feature = "string_split_off", since = "1.16.0")]
     pub fn split_off(&mut self, mid: usize) -> String {
         assert!(self.is_char_boundary(mid));
         let other = self.vec.split_off(mid);

src/libcollections/vec.rs

@@ -820,15 +820,13 @@ impl<T> Vec<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(dedup_by)]
-    ///
     /// let mut vec = vec![10, 20, 21, 30, 20];
     ///
     /// vec.dedup_by_key(|i| *i / 10);
     ///
     /// assert_eq!(vec, [10, 20, 30, 20]);
     /// ```
-    #[unstable(feature = "dedup_by", reason = "recently added", issue = "37087")]
+    #[stable(feature = "dedup_by", since = "1.16.0")]
     #[inline]
     pub fn dedup_by_key<F, K>(&mut self, mut key: F) where F: FnMut(&mut T) -> K, K: PartialEq {
         self.dedup_by(|a, b| key(a) == key(b))
@@ -841,7 +839,6 @@ impl<T> Vec<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(dedup_by)]
     /// use std::ascii::AsciiExt;
     ///
     /// let mut vec = vec!["foo", "bar", "Bar", "baz", "bar"];
@@ -850,7 +847,7 @@ impl<T> Vec<T> {
     ///
     /// assert_eq!(vec, ["foo", "bar", "baz", "bar"]);
     /// ```
-    #[unstable(feature = "dedup_by", reason = "recently added", issue = "37087")]
+    #[stable(feature = "dedup_by", since = "1.16.0")]
     pub fn dedup_by<F>(&mut self, mut same_bucket: F) where F: FnMut(&mut T, &mut T) -> bool {
         unsafe {
             // Although we have a mutable reference to `self`, we cannot make

src/libcollections/vec_deque.rs

@@ -643,8 +643,6 @@ impl<T> VecDeque<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(deque_extras)]
-    ///
     /// use std::collections::VecDeque;
     ///
     /// let mut buf = VecDeque::new();
@@ -655,9 +653,7 @@ impl<T> VecDeque<T> {
     /// assert_eq!(buf.len(), 1);
     /// assert_eq!(Some(&5), buf.get(0));
     /// ```
-    #[unstable(feature = "deque_extras",
-               reason = "matches collection reform specification; waiting on panic semantics",
-               issue = "27788")]
+    #[stable(feature = "deque_extras", since = "1.16.0")]
     pub fn truncate(&mut self, len: usize) {
         for _ in len..self.len() {
             self.pop_back();
@@ -1779,8 +1775,6 @@ impl<T: Clone> VecDeque<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(deque_extras)]
-    ///
     /// use std::collections::VecDeque;
     ///
     /// let mut buf = VecDeque::new();
@@ -1793,9 +1787,7 @@ impl<T: Clone> VecDeque<T> {
     ///     assert_eq!(a, b);
     /// }
     /// ```
-    #[unstable(feature = "deque_extras",
-               reason = "matches collection reform specification; waiting on panic semantics",
-               issue = "27788")]
+    #[stable(feature = "deque_extras", since = "1.16.0")]
     pub fn resize(&mut self, new_len: usize, value: T) {
         let len = self.len();