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    lang/rust: Install Cargo + use bundled crates · 0b663e6d
    dumbbell authored
    This port now provides Cargo. This is the recommended now because Cargo
    won't be provided separately in the future.
    
    To build Cargo, we set `extended = true` in `config.toml`. As a side
    effect, this flag also installs Rust source code. The port has a new
    `SOURCES` option (disabled by default) to keep those sources.
    
    As a consequence of this, `devel/cargo` is removed. Several ports
    and Makefiles in Mk were updated to depend on `lang/rust` instead of
    `devel/cargo`.
    
    The other big change in this patch is the use of the bundled crates,
    instead of relying on Cargo's registry (which was part of the distfiles,
    in order to allow offline builds). So now, we don't need to prepare the
    registry when updating this port.
    
    This has several other benefits:
        * It fixes the build with sudo(8).
        * It fixes the use of the ino-64 patch (it was not applied to the
          registry, thus not used).
    
    Compilation errors were fixed in the ino-64 patch.
    
    Various `.cargo-checksum.json` files are updated after the sources are
    patched (FBSD10_FIX, ino-64, and so on). This fixes builds which were
    failing with errors such as:
    
        error: the listed checksum of `.../rustc-1.19.0-src/src/vendor/lzma-sys/xz-5.2.3/build-aux/config.rpath` has changed:
        expected: c8b4c017079da9dfb3086a0583e60ffe736184d89005dc5973f0bb0fd17c04bb
        actual:   561b00eb30ecaef2c9da17bc195e7d2a7ea63facea38ea9849fbb0ed340bebba
    
    PR:		221088
    Reported by:	joneum@, nwhitehorn@, romain@,
    		Ekaterina Vaartis <vaartis@cock.li>,
    		david@catwhisker.org,
    		fullermd@over-yonder.net,
    		rum1cro@yandex.ru,
    		w.schwarzenfeld@utanet.at
    Differential Revision:	https://reviews.freebsd.org/D11783
    0b663e6d