Pullup ticket #5694 - requested by he
lang/rust: dependent update (for www/firefox)

Revisions pulled up:
- lang/rust/Makefile                                            1.26-1.28
- lang/rust/distinfo                                            1.15-1.17
- lang/rust/patches/patch-src_bootstrap_bin_rustc.rs            1.2
- lang/rust/patches/patch-src_bootstrap_lib.rs                  1.2
- lang/rust/patches/patch-src_vendor_filetime_.cargo-checksum.json deleted
- lang/rust/patches/patch-src_vendor_filetime_src_unix.rs      deleted

---
  Module Name: pkgsrc
  Committed By: jperkin
  Date: Thu Jan  4 15:18:51 UTC 2018

  Modified Files:
  pkgsrc/lang/rust: Makefile distinfo
  Added Files:
  pkgsrc/lang/rust/patches:
      patch-src_vendor_filetime_.cargo-checksum.json
      patch-src_vendor_filetime_src_unix.rs

  Log Message:
  rust: Restore SunOS support.

---
  Module Name: pkgsrc
  Committed By: ryoon
  Date: Mon Jan  8 09:33:58 UTC 2018

  Modified Files:
  pkgsrc/lang/rust: Makefile distinfo
  pkgsrc/lang/rust/patches: patch-src_bootstrap_bin_rustc.rs
      patch-src_bootstrap_lib.rs
  Removed Files:
  pkgsrc/lang/rust/patches:
      patch-src_vendor_filetime_.cargo-checksum.json
      patch-src_vendor_filetime_src_unix.rs

  Log Message:
  Update to 1.23.0

  * Disable Solaris/SunOS suppprt for a while

  Changelog:
  # What's in 1.23.0 stable

  New year, new Rust! For our first improvement today, we now avoid
  some unnecessary copies in certain situations. We've seen memory
  usage of using rustc to drop 5-10% with this change; it may be
  different with your programs.

  The documentation team has been on a long journey to move rustdoc
  to use CommonMark. Previously, rustdoc never guaranteed which
  markdown rendering engine it used, but we're finally committing to
  CommonMark. As part of this release, we render the documentation
  with our previous renderer, Hoedown, but also render it with a
  CommonMark compliant renderer, and warn if there are any differences.
  There should be a way for you to modify the syntax you use to render
  correctly under both; we're not aware of any situations where this
  is impossible. Docs team member Guillaume Gomez has written a blog
  post showing some common differences and how to solve them. In a
  future release, we will switch to using the CommonMark renderer by
  default. This warning landed in nightly in May of last year, and
  has been on by default since October of last year, so many crates
  have already fixed any issues that they've found.

  In other documentation news, historically, Cargo's docs have been
  a bit strange. Rather than being on doc.rust-lang.org, they've been
  at doc.crates.io. With this release, that's changing. You can now
  find Cargo's docs at doc.rust-lang.org/cargo. Additionally, they've
  been converted to the same format as our other long-form documentation.
  We'll be adding a redirect from doc.crates.io to this page, and
  you can expect to see more improvements and updates to Cargo's docs
  throughout the year.

  See the detailed release notes for more.

  ## Library stabilizations

  As of Rust 1.0, a trait named AsciiExt existed to provide ASCII
  related functionality on u8, char, [u8], and str. To use it, you'd
  write code like this:

  use std::ascii::AsciiExt;

  let ascii = 'a';
  let non_ascii = '❤';
  let int_ascii = 97;

  assert!(ascii.is_ascii());
  assert!(!non_ascii.is_ascii());
  assert!(int_ascii.is_ascii());

  In Rust 1.23, these methods are now defined directly on those types,
  and so you no longer need to import the trait. Thanks to our
  stability guarantees, this trait still exists, so if you'd like to
  still support Rust versions before Rust 1.23, you can do this:

  #[allow(unused_imports)]
  use std::ascii::AsciiExt;

  ...to suppress the related warning. Once you drop support for older
  Rusts, you can remove both lines, and everything will continue to
  work.

  Additionally, a few new APIs were stabilized this release:

      The various std::sync::atomic types now implement From their
      non-atomic types. For example, let x = AtomicBool::from(true);.
      () now implements FromIterator<()>; check the PR for a neat
      use-case.  RwLock<T> has had its Send restriction lifted

  See the detailed release notes for more.

  ## Cargo features

  cargo check can now check your unit tests.

  cargo uninstall can now uninstall more than one package in one
  command.

---
  Module Name: pkgsrc
  Committed By: ryoon
  Date: Tue Jan  9 11:47:33 UTC 2018

  Modified Files:
  pkgsrc/lang/rust: Makefile distinfo

  Log Message:
  Enable SunOS/Solaris support

  However SunOS build fails with internal libtool.

(bsiegert)