Move pages under tldr, lint run.sh, update docs

tldr/rustup-set

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rustup set
+
+> Alter `rustup` settings.
+> More information: <https://rust-lang.github.io/rustup>.
+
+- Set the default host triple:
+
+`rustup set default-host {{host_triple}}`
+
+- Set the default profile (`minimal` includes only `rustc`, `rust-std` and `cargo`, whereas `default` adds `rust-docs`, `rustfmt` and `clippy`):
+
+`rustup set profile {{minimal|default}}`
+
+- Set whether `rustup` should update itself when running `rustup update`:
+
+`rustup set auto-self-update {{enable|disable|check-only}}`