audio/ncspot: Update to v0.1.3

Changes:	https://github.com/hrkfdn/ncspot/releases/tag/v0.1.3

lang/rust: Update to 1.42.0

- Force rebuild all consumers to catch regressions early

Changes:	https://blog.rust-lang.org/2020/03/12/Rust-1.42.html
Tested by:	mikael, tobik
With hat:	rust
Differential Revision:	https://reviews.freebsd.org/D24020

Mk/Uses/cargo.mk: Allow disabling default features via CARGO_FEATURES

CARGO_FEATURES is overloaded to accept --no-default-features as a
special token which will set CARGO_{BUILD,INSTALL,TEST}_ARGS
appropriately.  This is done in preference over introducing yet
another knob.

lang/rust: Update to 1.41.1

- Force rebuild all consumers to fix potential miscompilations with
  1.41.0
- Enable SOURCES by default.  The sources are indexed by RLS and
  required for it to function properly, so they should be available
  by default.  This also makes sure we test the option properly.
- Remove implied --config=config.toml from x.py args
- Switch to the upstreamed backtrace crate patches like rust-nightly
- Enable WASM by default [0]
- Strip libraries (D23650) [1]
- Simplify plist generation (D23735) [2]

Changes:	https://blog.rust-lang.org/2020/02/27/Rust-1.41.1.html
Submitted by:	mikael [0,1,2]
With hat:	rust
Differential Revision:	https://reviews.freebsd.org/D23835

audio/ncspot: Update to 0.1.2

Changes:	https://github.com/hrkfdn/ncspot/releases/tag/0.1.2

lang/rust: Update to 1.41.0

- Force rebuild all consumers to catch regressions early
- Switch to cross-compiled (from amd64) bootstraps for all
  architectures generated with the incoming lang/rust-bootstrap
- Update cargo-c to 0.5.2 to unbreak librav1e build
- Make use of regular MAKE_ENV/TEST_ENV in lang/rust
- Turn on RUST_BACKTRACE in lang/rust and USES=cargo to hopefully
  produce more useful failure logs when something panics during
  builds

Changes:	https://blog.rust-lang.org/2020/01/30/Rust-1.41.0.html
Tested by:	mikael, tobik
With hat:	rust
Differential Revision:	https://reviews.freebsd.org/D23385

lang/rust: Update to 1.40.0

- Force rebuild all consumers to catch regressions early

Thanks to Mikael Urankar for providing updated bootstraps for
aarch64, armv6, armv7, powerpc64.

Changes:	https://blog.rust-lang.org/2019/12/19/Rust-1.40.0.html
Tested by:	mikael.urankar@gmail.com, tobik
With hat:	rust
Differential Revision:	https://reviews.freebsd.org/D22843

New port: audio/ncspot

Ncspot is a Spotify client written in Rust.  It is heavily inspired
by ncurses MPD clients, such as ncmpc.  It provides a simple and
resource friendly alternative to the official client as well as
support for platforms that currently do not have a Spotify client,
such as the BSDs.

Ncspot requires a Spotify Premium account.

WWW: https://github.com/hrkfdn/ncspot