Auto merge of #10404 - ehuss:fix-config-broken-links, r=alexcrichton
Auto merge of #10404 - ehuss:fix-config-broken-links, r=alexcrichton

Fix some broken doc links.

This fixes a few links in the config chapter that weren't linking correctly.

rustyhorde/cargo,nipunn1313/cargo,eminence/cargo,rust-lang/cargo,eminence/cargo,nipunn1313/cargo,nipunn1313/cargo,eminence/cargo,rustyhorde/cargo,rust-lang/cargo,rustyhorde/cargo,eminence/cargo,nipunn1313/cargo,rust-lang/cargo,rustyhorde/cargo,rust-lang/cargo