Merge pull request #2567 from ehuss/fix-proxies

Fix proxies docs.

Author: kinnison

doc/src/SUMMARY.md

@@ -10,6 +10,7 @@
     - [Toolchains](concepts/toolchains.md)
     - [Components](concepts/components.md)
     - [Profiles](concepts/profiles.md)
+    - [Proxies](concepts/proxies.md)
 - [Basic usage](basics.md)
 - [Overrides](overrides.md)
 - [Cross-compilation](cross-compilation.md)

doc/src/concepts/index.md

@@ -5,7 +5,7 @@
 `rustup` is a *toolchain multiplexer*. It installs and manages many Rust
 toolchains and presents them all through a single set of tools installed to
 `~/.cargo/bin`. The [`rustc`] and [`cargo`] executables installed in
-`~/.cargo/bin` are *proxies* that delegate to the real toolchain. `rustup`
+`~/.cargo/bin` are *[proxies]* that delegate to the real toolchain. `rustup`
 then provides mechanisms to easily change the active toolchain by
 reconfiguring the behavior of the proxies.
 
@@ -21,6 +21,7 @@ This is similar to Ruby's [rbenv], Python's [pyenv], or Node's [nvm].
 [nvm]: https://github.com/creationix/nvm
 [`rustc`]: https://doc.rust-lang.org/rustc/
 [`cargo`]: https://doc.rust-lang.org/cargo/
+[proxies]: proxies.md
 
 ## Terminology
 

doc/src/concepts/proxies.md

@@ -2,11 +2,11 @@
 
 `rustup` provides a number of wrappers for common Rust tools.
 These are called _proxies_ and represent commands which are
-provided by the various [components][].
+provided by the various [components].
 
 The list of proxies is currently static in `rustup` and is as follows:
 
-[components]: concepts/components.html
+[components]: components.md
 
 - `rustc` is the compiler for the Rust programming language, provided by the project itself and comes from the `rustc` component.